#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

int primeFactors(int n)
{
    
    int sum=1;
    while (n%2 == 0)
    {
        sum=sum+n;
        n = n/2;
    }
 
    for (int i = 3; i <=(n); i = i+2)
    {
        while (n%i == 0)
        {
            sum=sum+n;
            n = n/i;
        }
    }
    return sum;
 
}

int main()
{
    int n;
    scanf("%d\n",&n);
    int a[n];
    int sum1=0;
    for(int i=0;i<n;i++){
        scanf("%d",&a[i]);
        
        sum1=sum1+primeFactors(a[i]);
    }
    printf("%d\n",sum1);
    
    return 0;
}