#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 a_size, long int* a) {
    //  Return the length of the longest possible sequence of moves.
    long int s=0;int j,k;
    for(int i=0; i<a_size; i++)
    {
        while(1)
        {
            k=sqrt(a[i]);
            for(j=2;j<=k;j++)
                if(a[i]%j==0)
                    break;
            
            if(j<=k)
            {
                s=s+a[i];
                a[i]=a[i]/j;
            }
            else
            {
                if(a[i]!=1)
                    s=s+a[i]+1;
                else
                    s=s+1;
                break;
            }
        }
    }
    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;
}