def root(n, m):
    for i in range(int(n ** (1 / m)) + 5, -1, -1):
        if i**m <= n:
            return i
    return 0


N = int(input())
ans = []

curr = 0
right = 1

for left in range(1, root(N, 3) + 1):
    while curr + right**3 <= N:
        curr += right**3
        right += 1

    if left == right:
        break

    if curr == N:
        ans.append((left, right))

    curr -= left**3
    left += 1

print(len(ans))
for l, r in ans:
    print(l, r - 1)