#include<bits/stdc++.h>

using namespace std;

using LL = long long;

const int N = 2e5 + 5, MAXN = 2e5;

int n, a[N], vis[N];
LL sum[N], cnt[N], ans, now;

int main(){
  ios::sync_with_stdio(0), cin.tie(0);
  cin >> n;
  for(int i = 1; i <= n; ++i){
    cin >> a[i];
    cnt[a[i]] += a[i];
    vis[a[i]]++;
  }
  for(int i = 1; i <= MAXN; ++i){
    sum[i] = sum[i - 1] + cnt[i];
  }
  for(int i = 0; i <= MAXN; ++i){
    now = 0;
    for(int l = 1, r; l <= i; l = r + 1){
      r = i / (i / l);
      now += 1ll * i / l * (sum[r] - sum[l - 1]);
    }
    ans += (1ll * n * i - now) * vis[i];
  }
  cout << ans;
  return 0;
}
/*
a[i] - (a[i] / a[j]) * a[j];
*/