#!/bin/python3

import sys

    
def longestSequence(a):
    count = 0
    for i in range(len(a)):
        chk=a[i]
        count+=chk
        iter=2
        while(chk>1):
            if(chk%iter==0):
                chk=int(chk/iter)
                count+=chk
                iter=2
                continue
            else:
                iter+=1
    return count
if __name__ == "__main__":
    n = int(input().strip())
    a = list(map(int, input().strip().split(' ')))
    result = longestSequence(a)
    print(result)