#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<vector>
#include<cstdio>
#include <cmath>
#include<algorithm>

using namespace std;
struct solutie
{
	int st, dr;
};
vector <long long> s;
vector < pair <long long, long long> > sol;
int nrsol;

long long alg(long long n)
{
	long long d = 2;
	long long nrsol = 0;
	int last_stg = 2;
	while (last_stg != 1 && d<66000)
	{
		long long mij = n / d;
		long long st, dr;
		if (d % 2 == 1)
		{
			st = mij - (d / 2 );
			dr = mij + (d / 2);
			if (dr*(dr + 1) / 2 - (st - 1)*st / 2 == n || (st == 1 && (dr*(dr+1)/2 == n)))
			{
				nrsol++;
				sol.push_back(make_pair(st, dr));
				//cout << "d:" << d << "\n";
			}
		}
		else
		{
			dr = mij + (d / 2);
			st = mij - (d / 2 - 1);
			if (dr*(dr + 1) / 2 - (st - 1)*st / 2 == n || (st == 1 && (dr*(dr + 1) / 2 == n)))
			{
				nrsol++;
				sol.push_back(make_pair(st, dr));
				//cout << "d:" << d << "\n";

			}
			/*
			dr = mij + (d / 2 - 1);
			st = mij - (d / 2 );
			if (dr*(dr + 1) / 2 - (st - 1)*st / 2 == n)
			{
				nrsol++;
				sol.push_back(make_pair(st, dr));
			}
			*/
		}
		last_stg = st;
		d++;		
	}
	return nrsol;
}
int main()
{
	freopen("consecutive.in", "r", stdin);
	freopen("consecutive.out", "w", stdout);
	long long n;
	int test;
	scanf("%d", &test);
	for (int t = 1; t <= test; t++)
	{
		scanf("%lld", &n);
		sol.clear();
		printf("%lld\n", alg(n));
		for (int i = 0; i < sol.size(); i++)
		{
			printf("%lld %lld\n", sol[i].first, sol[i].second);
		}

	}
	
}