#include<bits/stdc++.h>
#pragma GCC optimize(8)
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
#pragma GCC optimize("unroll 8")
using namespace std;
#define int long long

const int N = 4e5 + 10;

int n, a[N], cnt[N], ans, sum;

int in()
{
    int k=0,f=1;
    char c=cin.get();
    while(c<'0'||c>'9')
    {
        if(c=='-')f=-1;
        c=getchar();
    }
    while(c>='0'&&c<='9')k=k*10+c-'0',c=cin.get();
    return k*f;
}

void out(int x)
{
    if(x<0)cout.put('-'),x=-x;
    if(x<10)cout.put(x+'0');
    else out(x/10),cout.put(x%10+'0');
}

signed main(){
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
//  freopen("mod.in", "r", stdin);
//  freopen("mod.out", "w", stdout);
  n = in();
  for(int i = 1; i <= n; i++){
    a[i] = in();
    cnt[a[i]]++;
    ans += n * a[i];
  }
  for(int i = 1; i <= 4e5; i++){
    cnt[i] += cnt[i - 1];
  }
  for(int i = 1; i <= 2e5; i++){
    int ttt = cnt[i] - cnt[i - 1];
    for(int j = 0; j * i <= 2e5; j++){
      int c = 0;
      if(j * i - 1 >= 0){
        c = cnt[(j + 1) * i - 1] - cnt[i * j - 1];
      }
      else{
        c = cnt[(j + 1) * i - 1];
      }
      sum += c * ttt * i * j;
    }
  }
  out(ans - sum);
  return 0;
}