#include<bits/stdc++.h>
using namespace std;
using ll = long long;

const int MAXN = 200001;

int n, a[MAXN];
ll ans, sum[MAXN], res;

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