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

queue< pair<int,int> > q;

int main()
{
    int n,t;
    ifstream t1("consecutive.in");
    ofstream t2("consecutive.out");

    int i,l,a;
    pair <int,int> m;
    t1>>t;
    for(int k=1;k<=t;k++)
    {
        t1>>n;
        for(i=1,l=2; l*(l+1) <= 2*n ; l++ )
        {
            if(2*n % l ==0 )
            {
                if( (2*n/l -l + 1 ) % 2 ==0 )
                {
                    a=(2*n/l + 1 -l) / 2;
                    if(a>0)
                        q.push( make_pair( a, a+l  ) );
                    else break;
                }
            }
        }
        t2<<q.size()<<'\n';
        while( !q.empty() )
        {
            m=q.front(); q.pop();
            t2<< m.first<< ' ' << m.second<<'\n';
        }
    }
    t1.close();
    t2.close();
    return 0;
}