import math

def main():
    import sys
    input = sys.stdin.read
    data = input().split()
    N = int(data[0])
    A = list(map(int, data[1:N+1]))
    
    m = min(A)
    count = A.count(m)
    
    sum_edges = 0
    for x in A:
        if x != m:
            g = math.gcd(m, x)
            lcm = (m * x) // g
            sum_edges += lcm
    sum_edges += (count - 1) * m
    
    print(sum_edges)

if __name__ == "__main__":
    main()