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

long int longestSequence(int n, long int* a) {
  long int s;
    for(int i=0;i<n;i++)
    { s=s+a[i];
        for(int j=2;j<=(a[i]);j++)
        {
            while(a[i]%j==0){
                s+=a[i]/j;
                a[i]/=j;
            }
        }
    }
   return s; 
}

int main() {
    int n; 
    scanf("%i", &n);
    long int *a = malloc(sizeof(long int) * n);
    for (int a_i = 0; a_i < n; a_i++) {
       scanf("%li",&a[a_i]);
    }
    long int result = longestSequence(n, a);
    printf("%ld\n", result);
    return 0;
}