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

const int MAXN = 200001;

int n, a[MAXN], tot, Max, l, r, x;
long long ans, sum[MAXN];

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], ans += 1ll * a[i] * n, Max = max(Max, a[i]);
  }
  sort(a + 1, a + n + 1);
  for(int i = 1; i <= n; ++i) {
    if(!tot || a[i] > a[tot]) {
      a[++tot] = a[i];
    }
  }
  n = tot;
  for(int i = 1; i <= Max; ++i) {
    sum[i] += sum[i - 1];
  }
  for(int i = 1; i <= n; ++i) {
    for(l = 1; l <= a[i]; l = r + 1) {
      x = a[i] / l;
      r = a[i] / x;
      ans -= 1ll * x * (sum[r] - sum[l - 1]);
    }
  }
  cout << ans;
  return 0;
}