import java.util.*;

class Main {
  public static final long MOD = 1000000007;
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    Integer a[] = new Integer[N];
    int ans = 0;
    for(int i=0; i<N; i++){
      a[i] = sc.nextInt();
      while(a[i] % 2 == 0){
        ans++;
        a[i] /= 2;
      }
    }
    
    System.out.println(ans);
    
  }

  public static int gcd(int a, int b){
    if(b == 0) return a;
    return gcd(b, a%b);
  }
}
/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