import java.util.*;
import java.io.*;

class Main
{
	public static void main(String[] args)
	{
		FastReader reader = new FastReader();
		PrintWriter writer = new PrintWriter(System.out);

		int n = reader.nextInt();
		long[] array = new long[n];
		for (int i=0; i<n; i++)
			array[i] = reader.nextLong();

		int count=0;
		for (int i=0; i<n; i++)
		{
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		}

		writer.println (count);
		writer.close();
	}

	static class FastReader
	{
		BufferedReader br;
		StringTokenizer st;

		public FastReader()
		{
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next()
		{
			while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt()
		{
			return Integer.parseInt(next());
		}

		long nextLong()
		{
			return Long.parseLong(next());
		}

		double nextDouble()
		{
			return Double.parseDouble(next());
		}

		String nextLine()
		{
			String str = "";
			try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			return str;
		}
	}
} import java.util.*; util.* java import java.io.*; io.* java class Main
{
	public static void main(String[] args)
	{
		FastReader reader = new FastReader();
		PrintWriter writer = new PrintWriter(System.out);

		int n = reader.nextInt();
		long[] array = new long[n];
		for (int i=0; i<n; i++)
			array[i] = reader.nextLong();

		int count=0;
		for (int i=0; i<n; i++)
		{
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		}

		writer.println (count);
		writer.close();
	}

	static class FastReader
	{
		BufferedReader br;
		StringTokenizer st;

		public FastReader()
		{
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next()
		{
			while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt()
		{
			return Integer.parseInt(next());
		}

		long nextLong()
		{
			return Long.parseLong(next());
		}

		double nextDouble()
		{
			return Double.parseDouble(next());
		}

		String nextLine()
		{
			String str = "";
			try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			return str;
		}
	}
} Main public static void main(String[] args)
	{
		FastReader reader = new FastReader();
		PrintWriter writer = new PrintWriter(System.out);

		int n = reader.nextInt();
		long[] array = new long[n];
		for (int i=0; i<n; i++)
			array[i] = reader.nextLong();

		int count=0;
		for (int i=0; i<n; i++)
		{
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		}

		writer.println (count);
		writer.close();
	} main {
		FastReader reader = new FastReader();
		PrintWriter writer = new PrintWriter(System.out);

		int n = reader.nextInt();
		long[] array = new long[n];
		for (int i=0; i<n; i++)
			array[i] = reader.nextLong();

		int count=0;
		for (int i=0; i<n; i++)
		{
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		}

		writer.println (count);
		writer.close();
	} FastReader reader = new FastReader(); reader new FastReader() PrintWriter writer = new PrintWriter(System.out); writer new PrintWriter(System.out) int n = reader.nextInt(); n reader.nextInt() reader.nextInt reader long[] array = new long[n]; array new long[n] n for (int i=0; i<n; i++)
			array[i] = reader.nextLong(); int i=0; int i=0; i 0 i<n i n i++ i++ i array[i] = reader.nextLong(); array[i] = reader.nextLong() array[i] array i reader.nextLong() reader.nextLong reader int count=0; count 0 for (int i=0; i<n; i++)
		{
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		} {
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		} while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			} array[i]%2 == 0 array[i]%2 array[i] array i 2 0 {
				array[i] /= 2;
				count++;
			} array[i] /= 2 array[i] array i 2 count++ count writer.println (count) writer.println writer count writer.close() writer.close writer String[] args args static class FastReader
	{
		BufferedReader br;
		StringTokenizer st;

		public FastReader()
		{
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next()
		{
			while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt()
		{
			return Integer.parseInt(next());
		}

		long nextLong()
		{
			return Long.parseLong(next());
		}

		double nextDouble()
		{
			return Double.parseDouble(next());
		}

		String nextLine()
		{
			String str = "";
			try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			return str;
		}
	} FastReader BufferedReader br; br StringTokenizer st; st public FastReader()
		{
			br = new BufferedReader(new InputStreamReader(System.in));
		} FastReader {
			br = new BufferedReader(new InputStreamReader(System.in));
		} br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) String next()
		{
			while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return st.nextToken();
		} next {
			while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return st.nextToken();
		} while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			} st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			} try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				} catch (IOException e)
				{
					e.printStackTrace();
				} IOException e {
					e.printStackTrace();
				} e.printStackTrace() e.printStackTrace e {
					st = new StringTokenizer(br.readLine());
				} st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt()
		{
			return Integer.parseInt(next());
		} nextInt {
			return Integer.parseInt(next());
		} return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong()
		{
			return Long.parseLong(next());
		} nextLong {
			return Long.parseLong(next());
		} return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble()
		{
			return Double.parseDouble(next());
		} nextDouble {
			return Double.parseDouble(next());
		} return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine()
		{
			String str = "";
			try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			return str;
		} nextLine {
			String str = "";
			try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			return str;
		} String str = ""; str "" try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			} catch (IOException e)
			{
				e.printStackTrace();
			} IOException e {
				e.printStackTrace();
			} e.printStackTrace() e.printStackTrace e {
				str = br.readLine();
			} str = br.readLine() str br.readLine() br.readLine br return str; str
import java.util.*;
import java.io.*;

class Main
{
	public static void main(String[] args)
	{
		FastReader reader = new FastReader();
		PrintWriter writer = new PrintWriter(System.out);

		int n = reader.nextInt();
		long[] array = new long[n];
		for (int i=0; i<n; i++)
			array[i] = reader.nextLong();

		int count=0;
		for (int i=0; i<n; i++)
		{
			while (array[i]%2 == 0)
			{
				array[i] /= 2;
				count++;
			}
		}

		writer.println (count);
		writer.close();
	}

	static class FastReader
	{
		BufferedReader br;
		StringTokenizer st;

		public FastReader()
		{
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next()
		{
			while (st == null || !st.hasMoreElements())
			{
				try
				{
					st = new StringTokenizer(br.readLine());
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt()
		{
			return Integer.parseInt(next());
		}

		long nextLong()
		{
			return Long.parseLong(next());
		}

		double nextDouble()
		{
			return Double.parseDouble(next());
		}

		String nextLine()
		{
			String str = "";
			try
			{
				str = br.readLine();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			return str;
		}
	}
}
