#include <algorithm>
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <numeric>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <ranges>
#include <iomanip>
using namespace std;
using ll = long long;

auto range(int n) { return views::iota(0, n); }

template<class T, class U> ostream& operator<<(ostream& os, const pair<T, U>& p){ return os << "{" << p.first << ", " << p.second << "}"; }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& obj) { os << "{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> ostream& operator<<(ostream& os, const set<T>& obj) { os << "set{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& obj) { os << "map{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }

#ifdef ONLINE_JUDGE
#define dump(expr) ;
#else
#define dump(expr) { cerr << "\033[33m#L" << __LINE__ << ": " << expr << "\033[39m" << endl; }
#endif

struct UF {
  vector<int> data;
  UF(int n) : data(n, -1) {}
  int root(int x) { return data[x] < 0 ? x : data[x] = root(data[x]); }
  bool find(int x, int y) { return root(x) == root(y); }
  void uni(int x, int y) {
    x = root(x);
    y = root(y);
    if (x != y) {
      if (data[x] < data[y])
        swap(x, y);
      data[x] += data[y];
      data[y] = x;
    }
  }
};

ll solve() {
  int n; cin >> n;
  const int A = 100000;
  // const int A = 1000;
  ll res = 0;
  vector<char> exists(A + 1);
  for ([[maybe_unused]] int i : range(n)) {
    ll x; cin >> x;
    if (exists[x]) res += x;
    exists[x] = 1;
  }

  vector<vector<ll>> buckets(A + 1);
  for (int g = 1; g <= A; ++g) {
    for (int i = g; i <= A; i += g) if (exists[i]) buckets[g].push_back(i);
  }
  dump(buckets);

  UF uf(A + 1);
  for (int g = A; g >= 1; --g) {
    map<int, ll> minvals;
    for (auto x : buckets[g]) {
      int idx = uf.root(x);
      if (minvals.count(idx) == 0) minvals[idx] = A + 1;
      minvals[idx] = min(minvals[idx], x);
    }
    dump(g << " " << minvals);

    if (minvals.size() > 1) {
      ll minval = A + 1, tot = 0;
      for (auto p : minvals) {
        minval = min(minval, p.second);
        tot += p.second;
      }
      res += (tot - minval) * minval / g;

      ll x0 = buckets[g][0];
      for (auto x : buckets[g]) uf.uni(x, x0);
    }
  }

  return res;
}

int main() {
  cout << fixed << setprecision(12);
  cout << solve() << endl;
}