import java.util.*;

public class Main {

  public static void main (String[] args) {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int[] a = new int[N];
    
    for (int i = 0; i < N; i++) {
      a[i] = sc.nextInt();
    }

    sc.close(); 

    long sum = 0;

    for (int i = 0; i < N; i++) {
      while (a[i] % 2 == 0) {
        sum++;
        a[i] = a[i] / 2; 
      }
    }

    System.out.println(sum);
  
  }

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz