import math
import sys

def main():
    input = sys.stdin.read().split()
    n = int(input[0])
    a = list(map(int, input[1:n+1]))
    x = min(a)
    count_x = a.count(x)
    sum_total = 0
    for num in a:
        if num == x:
            continue
        g = math.gcd(x, num)
        sum_total += (x * num) // g
    sum_total += (count_x - 1) * x
    print(sum_total)

if __name__ == "__main__":
    main()