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