from itertools import permutations
n = int(input())
ans = set()
for x in range(0,int(n**0.5)+1):
    for y in range(max(x,1),int(n**0.5)+1):
        if (n-x*y)%(x+y)==0:
            z = (n-x*y)//(x+y)
            if y>z: break
            ans |= set(permutations((x,y,z)))
print(len(ans))
for p in ans: print(*p)