INF = 10**6 + 2025
n = int(input())
a = []
for i in range(INF):
    a.append(i**3)
for i in range(1, len(a)):
    a[i] += a[i - 1]
ans = []
j = 0
for i in range(INF):
    while j != INF and a[j] < a[i] - n:
        j += 1
    if a[j] == a[i] - n:
        ans.append((j + 1, i))
print(len(ans))
for x, y in ans:
    print(x, y)