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

template<typename T>
vector<pair<T,pair<T,T>>> quotient_range(T N) {
    vector<pair<T,pair<T,T>>>ans;
    T i = 1;
    for(; i*i <= N; i++) {
        ans.push_back({N/i,{i,i}});
    }
    for(; i >= 1; i--) {
        T l = N/(i+1)+1;
        T r = N/i;
        if(l <= r && ans.back().second.first < l) {
            ans.push_back({N/l,{l,r}});
        }
    }
    return ans;
}

int main() {
    int N;
    cin >> N;
    vector<int>A(N);
    vector<long long>sum(200200);
    for(int i = 0; i < N; i++) {
        cin >> A[i];
        vector<pair<int,pair<int,int>>> a = quotient_range<int>(A[i]);
        for(int j = 0; j < a.size(); j++) {
            sum[a[j].second.first] += a[j].first;
            sum[a[j].second.second+1] -= a[j].first;
        }
    }
    for(int i = 0; i <= 200000; i++) {
        sum[i+1] += sum[i];
    }
    sort(A.begin(),A.end());
    long long sum2 = 0;
    long long ans = 0;
    for(int i = N-1; i >= 0; i--) {
        sum2 += A[i];
        ans -= sum2-1ll*A[i]*sum[A[i]];
        ans += 1ll*A[i]*(N-i-1);
    }
    cout << ans << endl;
}