#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>
long int count(long int n)
{
    if(n==1)
        return 1;
    if(n%2==0)
    {
        return n+count(n/2);
    }
    else
    { 
       long int q=0;
        for(long int i=3;i<=sqrt(n);i+=2)
            if(n%i==0)
            {
                q=i; break;
            }
        if(q==0)
            return n+count(1);
        else
        return n+count(n/q);
    }
}
long int longestSequence(int n, long int* a) {
    long int rem=0;
    for(int i=0;i<n;++i)
    {
        rem+=count(a[i]);
    }
    return rem;}

int main() {
    int n; 
    scanf("%i", &n);
    long int *a = malloc(sizeof(long int) * n);
    for (int a_i = 0; a_i < n; a_i++) {
       scanf("%li",&a[a_i]);
    }
    //long int *b = calloc(n,sizeof(long int));
   // b[1]=1;
    long int result = longestSequence(n, a);
    printf("%ld\n", result);
    return 0;
}