import java.util.*;

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

/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