#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int main() {  
    int n;
    cin >> n;
  long long int ans = 0,count;
    vector <long long> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i]; 
        count = 1;
        for(long int j = 2;a[i]!= 1;j++)
        {if(a[i]%j==0)
         {count += a[i];
          a[i] = a[i]/j;
            j=1;
            }
        }
        ans += count;
        
    }
    cout<<ans;
    
  
    /* Enter your code here. Print output to STDOUT */   
 
    return 0;
}