#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <vector>
#include <deque>
#include <algorithm>
#include <list>

using namespace std;

#define STDIN_FILE_OPEN(FileName) {freopen(FileName, "r", stdin);}
#define STDOUT_FILE_OPEN(FileName) {freopen(FileName, "w", stdout);}


typedef long long int int64;

int main()
{
	STDIN_FILE_OPEN("consecutive.in");
	STDOUT_FILE_OPEN("consecutive.out")

	int t, tests;

	scanf("%d", &tests);
	for (t = 0; t < tests; t++)
	{
		int64 S;
		int i;

		list<pair<int64, int64>> arr;

		scanf("%lld", &S);

		for (i = 2; ; i++)
		{
			int64 top = 2 * S - i*i - i;
			if (top < 0)
				break;
			int64 bot = 2 * i;

			if (top % bot == 0)
			{
				int64 m = top / bot;
				int64 n = m + i;
				m++;

				arr.push_back(pair<int64, int64>(m, n));
			}
		}

		printf("%d\n", arr.size());
		while (!arr.empty())
		{
			pair<int64, int64> p = arr.front();
			arr.pop_front();

			printf("%lld %lld\n", p.first, p.second);
		}
	}

	return 0;
}