#include <fstream>
#include <algorithm>
using namespace std;
ifstream fin("consecutive.in");
ofstream fout("consecutive.out");
int n,i,t,x,k,r,j,sol,suma,nr1,nr2;

struct vct{
int v1,v2;
}v[100001];


bool comp(vct a, vct b)
{
    return a.v1>b.v1;
}
int main()
{
    fin>>t;
    for(k=1;k<=t;++k)
    {
        nr1=0;


       fin>>x;

       for(i=2;i*(i+1)<=2*x;++i)
       {
           if((x-((i-1)*i/2))%i==0) v[++nr1].v1=(x-((i-1)*i/2))/i, v[nr1].v2=v[nr1].v1+i-1;

       }

       fout<<nr1<<"\n";
       for(i=1;i<=nr1;++i)
        fout<<v[i].v1<<" "<<v[i].v2<<"\n";
    }
    return 0;
}