#include <fstream>
#include <vector>
#define nmax 100002
using namespace std;
ifstream fin("consecutive.in");
ofstream fout("consecutive.out");

struct duet{
    long long a,b;
};


vector <duet> v;
long long x,y;

bool pot(long long n,long long k)
{
    if(n%(k+1)==0&&(n/(k+1)-k)%2==0)
    {
        x=(n/(k+1)-k)/2;
        y=x+k;
        return 1;
    }
    return 0;
}

int main()
{
    long long n;
    int t;
    fin>>t;
    for(int i=1;i<=t;i++)
    {
        fin>>n;
        v.clear();
        for(long long j=1;j*j<=2*n;j++)
            if(pot(2*n,j)&&x)
                v.push_back({x,y});
        int c=v.size()-1;
        fout<<c+1<<"\n";
        for(int j=0;j<=c;j++)
            fout<<v[j].a<<" "<<v[j].b<<"\n";
    }
    return 0;
}