# coding: utf-8
# Your code here!
N=int(input())

#xy+yz+zx=(N-x**2-y**2-z**2)/2
ITER=3400

ans=[]
for x in range(ITER):
    for y in range(ITER):
        if x+y==0:
            continue

        z=(N-x*y)/(x+y)
        if z==z//1 and z>=0:
            ans.append([x,y,int(z//1)])

print(len(ans))

for item in ans:
    print(*item)