/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2022.04.29 23:51:39
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;


int main() {
    int n;cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    sort(a.begin(), a.end());
    vector<bool> b(100001);
    vector<int> c(100001);
    b[a[0]] = true;
    ll cnt = 1;
    ll ans = 0;
    for (int i = 1; i < n; i++) {
        if (a[i-1] != a[i]) {
            ans += (cnt-1)*a[i-1];
            b.push_back(a[i]);
            b[a[i]] = true;
            c[a[i]] = a[i];
            cnt = 1;
        }
        else {
            cnt++;
        }
    }
    ans += (cnt-1)*a[n-1];
    for (int i = 1; i <= 100000; i++) {
        int k = 0;
        if (b[i]) k = 1;
        ans += (ll)i*c[i];
        for (int j = i; j <= 100000; j+=i) {
            if (k == 0 && b[j]) k = j/i;
            else if (k > 0) c[j] = min(c[j],k);
        }
    }
    cout << ans << endl;
}