import math
import sys

def min_divider(x):
    for i in range(2, int(math.sqrt(x))+1):
        if not x % i:
            return(i)
            break
    else:
        return(x)

def longestSequence(a):
    sum = 0
    for el in a:
        sum += el
        if (el != 1):
            while(True):
                el = el // min_divider(el)
                sum += el
                if el == 1: break
    return sum

if __name__ == "__main__":
    n = int(input().strip())
    a = list(map(int, input().strip().split(' ')))
    result = longestSequence(a)
    print(result)