#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
long long int f(long long int n){
    if(n==1)return 1;
    int st = (long long int)sqrt(n)+1;
    for(int i=2;i<=st;i++){
        if(n%i==0){
            return n+f(n/i);
        }
    }
    return n+1;
}
int main() {  
    int n;
    cin >> n;
  
    vector <long long> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    long long int ans=0;
    for(int i=0;i<n;i++){
        ans = ans+f(a[i]);
    }
    /* Enter your code here. Print output to STDOUT */   
    cout<<ans<<endl;
    return 0;
}