import sys
import math

def main():
    data = list(map(int, sys.stdin.read().split()))
    n = data[0]
    A = data[1:n+1]
    
    m = min(A)
    cnt_m = A.count(m)
    
    sum_lcm = 0
    for a in A:
        if a != m:
            gcd_val = math.gcd(m, a)
            sum_lcm += m * a // gcd_val
    
    sum_total = sum_lcm + (cnt_m - 1) * m
    print(sum_total)

if __name__ == "__main__":
    main()