#include <cstdio>
#define MAXN 65536
int v[2][MAXN];
int main(){
   FILE*fi,*fout;
   int m,i,t,n;
   long long l;
   fi=fopen("consecutive.in" ,"r");
   fout=fopen("consecutive.out" ,"w");
   fscanf(fi,"%d" ,&t);
   while(t>0){
      t--;
      fscanf(fi,"%d" ,&n);
      l=2;
      m=0;
      while((l*(l+1))/2<=n){
          if((n-(l*(l+1))/2)%l==0){
              v[0][m]=(n-(l*(l+1))/2)/l+1;
              v[1][m]=v[0][m]+l-1;
              m++;
          }
          l++;
      }
      fprintf(fout,"%d\n" ,m);
      for(i=0;i<m;i++)
         fprintf(fout,"%d %d\n" ,v[0][i],v[1][i]);
   }

   fclose(fi);
   fclose(fout);
   return 0;
}