#include<bits/stdc++.h>
using namespace std;const int MAXN = 200001;int n, a[MAXN], Max, l, r;long long ans, sum[MAXN];int main() {  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]);  }  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) {      int x = a[i] / l;      r = a[i] / x;      ans -= 1ll * x * (sum[r] - sum[l - 1]);    }  }  cout << ans;  return 0;}