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_m = m * (count_m - 1)
    
    sum_other = 0
    for num in a:
        if num == m:
            continue
        gcd = math.gcd(m, num)
        lcm = (m * num) // gcd
        sum_other += lcm
    
    total = sum_m + sum_other
    print(total)

if __name__ == '__main__':
    main()