mod = 998244353
NN = 10 ** 5


def main():
    import sys
    input = sys.stdin.readline

    div = [[] for _ in range(NN + 1)]
    for d in range(1, NN + 1):
        for x in range(1, NN + 1):
            if d * x > NN:
                break
            div[d * x].append(d)

    N = int(input())
    A = list(map(int, input().split()))

    A.sort()
    ans = 0
    seen = [10 ** 17] * (NN + 1)

    a = A[0]
    for d in div[a]:
        seen[d] = min(seen[d], a // d)

    for a in A[1:]:
        mi = 10 ** 17
        for d in div[a][::-1]:
            mi = min(mi, seen[d])
        ans += a * mi
        for d in div[a]:
            seen[d] = min(seen[d], a // d)

    print(ans)


if __name__ == '__main__':
    main()