import java.util.Scanner;

public class Main {
	  public static void main(String args[]) {
		    Scanner scanner = new Scanner(System.in);

		    int N = scanner.nextInt();
		    long array[];
		    array = new long [N];
		    int counter = 0;
		    for(int i = 0; i < array.length; i++)
		    {
		    	array[i] = scanner.nextLong();
		    	while(array[i]%2 == 0)
		    	{
		    		counter = counter + 1;
		    		array[i] = array[i]/2;
		    	}
		    }
		    System.out.println(counter);
		    		scanner.close();}
		  }
/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