#include <bits/stdc++.h>

using namespace std;

long calc(long num)
{
    long as=0;
    as+=num;
    
    long i=2;
    long div=1;
    while(div*i<=num)
    {
       if(num%(div*i)==0)
       {
           div = div * i;
           as+=num/div;
           i=1;
       }
       i++;    
    }
    return as;
}

long longestSequence(vector <long> a) {
    long ans = 0;
    
    for(int i=0;i<a.size();i++)
    {
        ans+=calc(a[i]);
    }
    return ans;
}

int main() {
    int n;
    cin >> n;
    vector<long> a(n);
    for(int a_i = 0; a_i < n; a_i++){
       cin >> a[a_i];
    }
    long result = longestSequence(a);
    cout << result << endl;
    return 0;
}