#include<bits/stdc++.h>
using namespace std;
#define int long long

const int N = 4e5 + 10;

int n, a[N], cnt[N], ans, sum;

signed main(){
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
//  freopen("mod.in", "r", stdin);
//  freopen("mod.out", "w", stdout);
  cin >> n;
  for(int i = 1; i <= n; i++){
    cin >> a[i];
    cnt[a[i]]++;
    ans += n * a[i];
  }
  for(int i = 1; i <= 4e5; i++){
    cnt[i] += cnt[i - 1];
  }
  for(int i = 1; i <= 2e5; i++){
    int ttt = cnt[i] - cnt[i - 1];
    for(int j = 0; j * i <= 2e5; j++){
      int c = 0;
      if(j * i - 1 >= 0){
        c = cnt[(j + 1) * i - 1] - cnt[i * j - 1];
      }
      else{
        c = cnt[(j + 1) * i - 1];
      }
      sum += c * ttt * i * j;
    }
  }
  cout << ans - sum;
  return 0;
}