#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
#include<bitset>
#include<cassert>
#include<complex>
#include<fstream>
#include<cstdlib>
#include<functional>
using namespace std;
typedef long long ll;
const int mod=998244353;
const int dx[]={1,0,0,-1},dy[]={0,1,-1,0};
int sum[200001];
int main(){
	int n,a[200000];
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>a[i];
		sum[a[i]]++;
	}
	sort(a,a+n);
	for(int i=0;i<200000;i++)
		sum[i+1]+=sum[i];
	ll ans=0;
	for(int i=0;i<n;i++)
		for(int j=0;j*a[i]<=200000;j++)
			ans+=ll(sum[min(200000,(j+1)*a[i]-1)]-sum[max(j*a[i]-1,0)])*a[i]*j;
	for(int i=0;i<n;i++)
		ans+=a[i]*ll(n-(i+1)*2);
	cout<<ans<<endl;
}