import sys
import math

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

if __name__ == "__main__":
    main()