#include <iostream>
#include <vector>
#include <utility>
using namespace std;
using ll = long long;
using pii = pair<int, int>;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll N; cin>>N;
    vector<ll> cube;
    for (ll i=1;i*i*i<=N;i++) cube.push_back(i*i*i);
    int M = cube.size();

    ll cnt = 0;
    vector<pii> ans;
    ll sum = 0;
    int right = 0;
    for (int left=0;left<M;left++){
        while(right<M&&sum+cube[right]<=N) sum += cube[right++];
        if (sum==N){
            cnt++;
            ans.push_back({left+1, right});
        }
        if (right==left) right++;
        else sum -= cube[left];
    }

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