import sys
import math
from collections import Counter

def main():
    input = sys.stdin.read().split()
    n = int(input[0])
    a = list(map(int, input[1:n+1]))
    
    m = min(a)
    freq = Counter(a)
    
    total = (freq[m] - 1) * m
    
    for num in freq:
        if num == m:
            continue
        cnt = freq[num]
        g = math.gcd(m, num)
        lcm = m * num // g
        total += (cnt - 1) * num + lcm
    
    print(total)

if __name__ == "__main__":
    main()