import java.util.Scanner;

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

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