import math

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

if __name__ == "__main__":
    main()