from collections import deque


def shakutori(a: list, can_expand, expand, shrink, identity):
    n = len(a)
    res = identity()
    hi = -1
    for lo in range(n):
        if lo > hi:
            hi = lo - 1
            res = identity()

        # 必要な分だけ伸ばす
        while hi+1 < n and can_expand(res, a[hi+1]):
            res = expand(res, a[hi+1])
            hi += 1

        if lo <= hi:
            yield res, lo, hi
            res = shrink(res, a[lo])  # lo をひとつ進める


# res に x を追加できるか
def can_expand(res, x):
    return res + pow(x, 3) <= N


# 伸ばす(res に x を追加)
def expand(res, x):
    res += pow(x, 3)
    return res


# 縮める(res から x を削除)
def shrink(res, x):
    res -= pow(x, 3)
    return res


N = int(input())

ans = []
a = [x for x in range(1, 10**6+10)]
for res, l, r in shakutori(a, can_expand, expand, shrink, int):
    if res == N:
        ans.append((l+1, r+1))

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