import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N; N N = sc.nextInt() N sc.nextInt() sc.nextInt sc long ans = 0; ans 0 for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		} {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		} long a; a a = sc.nextLong() a sc.nextLong() sc.nextLong sc while(a % 2 == 0) {
				ans++;
				a /= 2;
			} a % 2 == 0 a % 2 a 2 0 {
				ans++;
				a /= 2;
			} ans++ ans a /= 2 a 2 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N;
		N = sc.nextInt();

		long ans = 0;
		for (int i = 0; i < N; i++) {
			long a;
			a = sc.nextLong();

			while(a % 2 == 0) {
				ans++;
				a /= 2;
			}
		}
		System.out.println(ans);
	}
}