n = int(input())
a = [0]
m = 1
while m ** 3 <= 10 ** 18:
    a.append(a[-1] + m ** 3)
    m += 1
m -= 1
i = j = 0
ans = []
while i < m:
    while j < m and a[j] - a[i] < n:
        j += 1
    if j == m:
        break
    if a[j] - a[i] == n:
        ans.append((i + 1, j))
    i += 1

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