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


long long ans=0;

void f(long long n)
{
    
    ans+= n;
    long long kl = sqrt(n);
    for(long long i=2;i<=kl;i++)
    {
        if(n%i==0)
        {
            f(n/i);
            break;
        }
        
    }
    
}

int main() {  
    int n;
    cin >> n;

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