import math
import sys

def main():
    input = sys.stdin.read
    data = input().split()
    N = int(data[0])
    A = list(map(int, data[1:N+1]))
    m = min(A)
    c = A.count(m)
    total = (c - 1) * m
    for a in A:
        if a != m:
            g = math.gcd(a, m)
            lcm = (a * m) // g
            total += lcm
    print(total)

if __name__ == "__main__":
    main()