N = int(input())

T = [0]

i = 1
while True:
	if i ** 3 > N:
		break
	T.append(T[-1] + i ** 3)
	i += 1

M = len(T)
dic = {}
ans = []
for i in range(M):
	if T[i] - N in dic:
		ans.append([dic[T[i] - N] + 1, i])
	dic[T[i]] = i

print(len(ans))
for a in ans:
	print(*a)