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

long long int divi(long long int ta)
{
    long long int i = 2;
    while(i*i <= ta)
    {
        if (ta%i==0)
        {
            return i;
        }
        i += 1;
    }
    return ta;
}

long long int solve(long long int el)
{
    long long int t = 0;
    while (el!=1)
    {
        long long int ro = divi(el);
        t += el;
        //cerr << "el : " << el << "/ ro : " << ro << '\n';
        el = el / ro;
    }
    return t + 1;
    
}

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