import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		int n = Integer.parseInt(br.readLine());

		String str[] = br.readLine().split(" ");

		int a[] = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(str[i]);
		}

		int count = 0;
		for (int i = 0; i < n; i++) {
			int temp = 0;

			while (a[i] % 2 == 0) {
				temp++;
				a[i] /= 2;
			}
			count += temp;
		}

		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