import random
import math

n = int(input())
while True:
  a = random.randint(2, n - 2)
  b = math.gcd(n, a)
  if b != 1:
    print("!", b, n // b)
    break
  print("?", a)
  r = int(input())
  if r % 2 == 1:
    continue
  x = math.pow(a, r // 2, n)
  if x == n - 1:
    continue
  p = math.gcd(n, x + 1)
  print("!", p, n // p)
  break