#include <bits/stdc++.h>
using namespace std;
int main () {
	using ll = long long;
	ll N;
	cin >> N;
	std::vector<tuple<ll ,ll, ll>> A;
	for (ll x = 0; x * x <= N; x ++) {
		ll mx = (x ? N / x : N);
		for (ll y = x; y <= mx; y ++) {
			if (x + y == 0) continue;
			ll z = (N - x * y) / (x + y);
			if (x * y + y * z + z * x == N) {
				A.emplace_back(x, y, z);
				if (x < y) {
					A.emplace_back(y, x, z);
				}
			}
		}
	}
	cout << A.size() << endl;
	for (auto& [a, b, c] : A) {
		printf("%lld %lld %lld\n", a, b, c);
	}
}