import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

/*Atcoder用
 * 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] tmp = br.readLine().split(" ");
		int a = Integer.parseInt(tmp[0]);
		int b = Integer.parseInt(tmp[1]);
		int c = Integer.parseInt(tmp[2]);


		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String get = br.readLine();
		char[] s = get.toCharArray();
		for(char c:s)System.out.println(c);

		List<Integer> ls = new ArrayList<Integer>();
		String[] tmp = br.readLine().split(" ");
		for (int n = 0; n < N; n++) {
			ls.add(Integer.parseInt(tmp[n]));
		}
 */

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] tmp = br.readLine().split(" ");
		int N = Integer.parseInt(tmp[0]);

		List<Integer> ls = new ArrayList<Integer>();
		String[] foo = br.readLine().split(" ");
		for (int n = 0; n < N; n++) {
			ls.add(Integer.parseInt(foo[n]));
		}

		int count = 0;

		for(int i = 0;i<ls.size();i++){
			while(true){
				if(ls.get(i) % 2 == 0){
					count++;
					ls.set(i, ls.get(i)/2);
				}else break;
			}
		}

		System.out.println(count);
	}
}
/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