#include <algorithm>
#include <iostream>
#include <utility>
#include <vector>

int main() {
    using namespace std;
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    using u128 = __uint128_t;
    constexpr u128 M = 1000100;
    vector<u128> acc(M, 0);
    for (u128 i = 1; i < M; i++) { acc[i] = acc[i - 1] + i * i * i; }

    long long n;
    cin >> n;
    vector<pair<int, int>> ans;
    for (int l = 0; l < static_cast<int>(M); l++) {
        int r = lower_bound(acc.begin(), acc.end(), acc[l] + n) - acc.begin();
        if (acc[l] + n == acc[r]) { ans.emplace_back(l + 1, r); }
    }

    cout << ans.size() << "\n";
    for (auto [l, r] : ans) { cout << l << " " << r << "\n"; }
}