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)
    c = a.count(m)
    
    total = (c - 1) * m
    
    for num in a:
        if num != m:
            g = math.gcd(num, m)
            lcm = num * m // g
            total += lcm
    
    print(total)

if __name__ == '__main__':
    main()