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

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vl = vector<ll>;
#define rep3(i, a, b, c) for (ll i = (a); i < (b); i += (c))
#define rep2(i, a, b) rep3(i, a, b, 1)
#define rep1(i, n) rep2(i, 0, n)
#define rep0(n) rep1(aaaaa, n)
#define ov4(a, b, c, d, name, ...) name
#define rep(...) ov4(__VA_ARGS__, rep3, rep2, rep1, rep0)(__VA_ARGS__)
#define per(i, a, b) for (ll i = (a) - 1; i >= (b); i--)
#define fore(e, v) for (auto&& e : v)
#define all(a) begin(a), end(a)
#define sz(a) (int)(size(a))
#define lb(v, x) (lower_bound(all(v), x) - begin(v))
#define eb emplace_back

template <typename T, typename S>
bool chmin(T& a, const S& b) {
  return a > b ? a = b, 1 : 0;
}
template <typename T, typename S>
bool chmax(T& a, const S& b) {
  return a < b ? a = b, 1 : 0;
}
const int INF = 1e9 + 100;
const ll INFL = 3e18 + 100;
#define i128 __int128_t
struct _ {
  _() { cin.tie(0)->sync_with_stdio(0), cout.tie(0); }
} __;

int main(){
  int N;
  cin>>N;
  vi A(N);
  fore(i,A)cin>>i;
  const int MAX_A=1'000'000+9;
  vi d(MAX_A);
  iota(all(d),0);
  rep(i,2,MAX_A){
    if(d[i]!=i)continue;
    rep(j,i*2,MAX_A,i)chmin(d[j],i);
  }
  vi pidx(MAX_A);
  int pcnt=0;
  {
    rep(i,2,MAX_A){
      if(d[i]==i)pidx[i]=pcnt++;
    }
  }
  atcoder::dsu uf(N+pcnt);
  using al3 = array<ll,3>;
  vector<al3> E;
  rep(i,N){
    while(A[i]>1){
      ll p=d[A[i]],c=0;
      while(d[A[i]]==p){
        A[i]/=p;
        c++;
      }
      E.push_back(al3{-p*c,pcnt+i,pidx[p]});
    }
  }
  ll ans=0;
  sort(all(E));
  fore(e,E){
    if(uf.same(e[1], e[2])){
      ans-=e[0];
    }else{
      uf.merge(e[1], e[2]);
    }
  }
  cout<<ans<<'\n';
}