#include <fstream>
#include <iostream>
#include <queue>
using namespace std;

int main()
{
    ifstream in ("consecutive.in");
    ofstream out ("consecutive.out");
    unsigned tests, sum;
    in>>tests;
    while(tests--)
    {
        in>>sum;
        queue<unsigned> sums;
        unsigned start, solutii=0;
        for(unsigned lung=2; lung<=sum/2; lung++)
            if(2*sum+lung>lung*lung && (2*sum+lung-lung*lung)%(2*lung)==0)
                {
                    solutii++;
                    start=(2*sum+lung-lung*lung)/(2*lung);
                    cout<<"st: "<<start<<" lung:"<<lung<<endl;
                    sums.push(start); sums.push(start+lung-1);
                }
        out<<solutii<<endl;
        unsigned endd;
        while(solutii--)
            {
                start=sums.front(); sums.pop();
                endd=sums.front(); sums.pop();
                out<<start<<" "<<endd<<endl;
            }
    }

}