#include <bits/stdc++.h>
#define MAX 100005
#define ll long long int
using namespace std;
ll divide(ll n)
{
    if(n==1)
        return 1;
    long ans=-1;
    if(n%2==0)
    {
        ans=2;
        return ans;
    }
    for(ll i=3;i<=sqrt(n);i++)
    {
        if(n%i==0)
        {
            return i;
        }
    }
    return n;
}
ll longestSequence(vector <ll> a) {
    //  Return the length of the longest possible sequence of moves.

    ll n=a.size();
    ll ans=0;
    for(int i=0;i<n;i++)
    {
        ans+=a[i];
        while(a[i]!=1)
        {
            ll x=divide(a[i]);
            ans+=a[i]/x;
            a[i]/=x;
        }
    }
    return ans;
}

int main() {
    ll n;
    cin >> n;
    vector<ll> a(n);
    for(ll a_i = 0; a_i < n; a_i++){
       cin >> a[a_i];
    }
    ll result = longestSequence(a);
    cout << result << endl;
    return 0;
}