import sys

n = int(input())
for i in range(2, n):
    if n % i == 0:
        print('! %d %d' % (i, n // i))
        exit()
    print('? %d' % i)
    sys.stdout.flush()
    t = int(input())
    if t % 2 == 0:
        x = pow(i, t // 2, n)
        x0 = (x + 1) % n
        x1 = (x - 1) % n
        if n % x0 == 0:
            print('! %d %d' % (x0, n // x0))
            exit()
        if n % x1 == 0:
            print('! %d %d' % (x1, n // x1))