import java.util.Scanner;

public class Main{
  
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    Long ans = 0L;
    for(int i =0;i<N;i++){ans += pow(sc.nextLong());}
    System.out.println(ans);
    sc.close();
  }
  public static Long pow(Long a){
    Long ret = 0L;
    while(a%2==0){
      ret+=1;
      a = a/2;
    }
    return  ret;
  }
}
  
/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