import sys
import math

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

if __name__ == "__main__":
    main()