import itertools

n=int(input())
ans=set()
for x in range(0,int(n**0.5)+10):
  for y in range(1,int(n**0.5)+10):
    if (n-x*y)%(x+y)==0:
      z=(n-x*y)//(x+y)
      if z>=0:
        for p in itertools.permutations([x,y,z]):
          ans.add(p)

print(len(ans))
for i in ans:
  print(*i)