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)
    count_x = a.count(x)
    sum_total = (count_x - 1) * x
    for num in a:
        if num != x:
            g = math.gcd(x, num)
            sum_total += (x * num) // g
    print(sum_total)

if __name__ == "__main__":
    main()