#include<bits/stdc++.h>
using namespace std;
using ll = long long;

ll u[100005];
vector<ll> a[100005];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    for(ll i = 1;i <= 100000;i++)
    {
        for(ll j = i;j <= 100000;j += i)
        {
            a[j].push_back(i);
        }
    }
    ll n;
    cin >> n;
    ll i,j;
    ll ans = 0;
    for(i = 1;i <= n;i++)
    {
        ll x;
        cin >> x;
        //ll y = sqrt(x);
        if(i == 1)
        {
            for(ll tmp = 0;tmp < a[x].size();tmp++)
            {
                j = a[x][tmp];
                if(u[j] == 0) u[j] = x/j;
                else u[j] = min(u[j], x/j);
            }
        }else
        {
            ll add = LLONG_MAX/2;
            for(ll tmp = 0;tmp < a[x].size();tmp++)
            {
                j = a[x][tmp];
                if(u[j] != 0) add = min(add, x * u[j]);
                //else u[j] = min(u[j], x/j);
            }
            for(ll tmp = 0;tmp < a[x].size();tmp++)
            {
                j = a[x][tmp];
                if(u[j] == 0) u[j] = x/j;
                else u[j] = min(u[j], x/j);
            }
            ans += add;
        }
    }
    cout << ans;
}