#include <bits/stdc++.h>

[[nodiscard]] static inline constexpr std::vector<std::pair<uint_least32_t, uint_least32_t>> solve(const uint_fast64_t N) noexcept
{
	std::vector<std::pair<uint_least32_t, uint_least32_t>> ans;
	ans.reserve(1'000'000);

	for (uint_fast64_t L = 1, R = 1, sum = 1; L * L * L <= N; sum -= L * L * L, ++L)
	{
		while (sum < N) ++R, sum += R * R * R;
		if (sum == N) ans.emplace_back(L, R);
	}

	return ans;
}

static inline void output(const std::vector<std::pair<uint_least32_t, uint_least32_t>>& ans) noexcept
{
	std::cout << ans.size() << '\n';
	for (const auto& [l, r] : ans)
		std::cout << l << ' ' << r << '\n';
}

int main()
{
	std::cin.tie(nullptr);
	std::ios::sync_with_stdio(false);

	uint_fast64_t N;
	std::cin >> N;

	output(solve(N));
	return 0;
}