import java.util.*;
public class Main {
	static Scanner sc=new Scanner(System.in);
	public static void main(String args[]) {
		int N=sc.nextInt(),res=0;
		for(int i=0;i<N;i++) {
			long temp=sc.nextLong();
			while((temp&1)==0) {
				res++;
				temp=temp>>1;;
			}
		}
		System.out.println(res);
	}
}
/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