#include <bits/stdc++.h>

using namespace std;
long lowfac(long n)
{
    long x;
    for(x=2;x<=sqrt(n);++x)
    {
        if(n%x==0)
            return x;    
    }
    return 1;
}
long long longestSequence(vector <long> a) {
    long long s=0;
    for(int i=0;i<a.size();++i)
    {
        if(a[i]==1)
            s=s+1;
        else
        {
           
            if(lowfac(a[i])==1)
                s=s+a[i]+1;
            else
            {
                
                long t=a[i],l=lowfac(t);
                for(;l!=1;l=lowfac(t))
                {
                    s=s+t;
                    t=t/lowfac(t);
                }      
                             
                s=s+t+1;
            }
        }
    }
    return s;
}

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