#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
#define ll long long
int main()
{
    int n;
    cin >> n;

    vector <long long> a(n);
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
    }

    /* Enter your code here. Print output to STDOUT */
    ll ans=0;

    for(int i=0;i<n;i++)
    {
        ll temp=a[i];
        ans=ans+temp;
        while(true)
        {
            if(temp%2==0)
            {
                temp=temp/2;
                ans=ans+temp;
            }
            else
            {
                if(temp==1)break;
                int flag=0;
                for(ll i=temp-1;i>sqrt(temp);i--)
                {
                    if(temp%i==0)
                    {
                        temp=temp/i;
                        ans=ans+temp;
                        flag=1;
                        break;
                    }

                }
                if(flag==0)
                {
                    ans=ans+1;
                    break;
                }

            }


        }

    }

    cout<<ans;



    return 0;
}