#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

long int longestSequence(int a_size, long int* a) {
   int i,j;
    long long sum=0,n=0;
    for(i=0;i<a_size;i++)
    {
        if(a[i]==1){
          sum=sum+1;continue;}
        n=a[i];
        sum=sum+n;
        for(j=2;j<=n/2;)
        {
            if(n%j==0)
            {sum=sum+n/j;n=n/j;}
            else
                j++;
        }
               sum=sum+1;
      }
    return sum;
}

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 result = longestSequence(n, a);
    printf("%ld\n", result);
    return 0;
}