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

template<typename T, typename U> void cmax(T &a, U b) { if (a < b) a = b; }
template<typename T, typename U> void cmin(T &a, U b) { if (a > b) a = b; }

template<typename T> class FenwickTree {
  int N, M;
  vector<T> B;
public:
  FenwickTree(int n) : N(n + 1), M(1), B(N, 0) {
    while (M * 2 <= N) M *= 2;
  }
  FenwickTree(const vector<T> &v) : N((int) v.size() + 1), M(1), B(N, 0) {
    for (int i = 0; i < N - 1; i++) add(i, v.at(i));
    while (M * 2 <= N) M *= 2;
  }
  void add(int i, T x) {
    i++;
    while (i < N) B.at(i) += x, i += i & -i;
  }
  void add(int l, int r, T x) {
    add(l, x);
    add(r + 1 , -x);
  }
  T sum(int i) {
    i++;
    T ret = 0;
    while (i > 0) ret += B.at(i), i -= i & -i;
    return ret;
  }
  T sum(int l, int r) {
    return sum(r) - sum(l - 1);
  }
  T at(int i) {
    return sum(i) - sum(i - 1);
  }
  int lower_bound(T w) {
    if (w <= 0) return 0;
    int x = 0;
    for (int k = M; k > 0; k /= 2) {
      if (x + k <= N - 1 && B.at(x + k) < w) {
        w -= B.at(x + k);
        x += k;
      }
    }
    return x;
  }
  int upper_bound(T w) {
    if (w < 0) return 0;
    int x = 0;
    for (int k = M; k > 0; k /= 2) {
      if (x + k <= N - 1 && B.at(x + k) <= w) {
        w -= B.at(x + k);
        x += k;
      }
    }
    return x;
  }
};

signed main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);

  int N;
  cin >> N;
  vector<int> A(N);
  for (int i = 0; i < N; i++) cin >> A.at(i);

  int M = 2e5 + 1;
  FenwickTree<int> FT(M * 2);
  for (auto a : A) FT.add(a, 1);

  long tmp = 0;
  for (int i = 1; i < M; i++) {
    for (int j = i; j < M; j += i) {
      tmp += (long) FT.at(i) * FT.sum(j, j + i - 1) * j;
    }
  }

  long acc = accumulate(A.begin(), A.end(), 0L);
  cout << acc * N - tmp << "\n";
}