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

long int dive(long int n)
{
    long int j,ans=0;
    for(j=2;j<=sqrt(n);j++)
    {
         if(n%j==0)
         {
             ans=j;
             break;
         }
    }
    if(j==n)
    {
        ans=1;
    }
    return ans;
}

long int longestSequence(int n, long int* a) {
    
    long int sum=0,i,j;
    for(i=0;i<n;i++)
    {
        if(a[i]==1)
        {
            sum=sum+1;
        }
        else
        {
            sum=sum+1+a[i];
            while(dive(a[i])>1)
            {
                sum = sum + (a[i]/dive(a[i]));
                a[i] = (a[i]/dive(a[i]));
            }    
        }
    }
    return sum; 
}

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;
}