import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
    
   
    static long calc(long a){
        long temp = a;
        if(a == 1){
            return 1L;
        }
        long temp2 = Math.round(Math.sqrt(a));
        for(long i = 2; i <= temp2; i++){
            
            if(a % i == 0){
                return a+calc(a/i);
            }
        }
        return a+calc(1);
    }
    
    
    static long longestSequence(long[] a) {
        long ans = 0;
        for(int i = 0; i < a.length; i++){           
            ans += calc(a[i]);
        }
        return ans;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        long[] a = new long[n];
        for(int a_i = 0; a_i < n; a_i++){
            a[a_i] = in.nextLong();
        }
        long result = longestSequence(a);
        System.out.println(result);
        in.close();
    }
}