from math import sqrt
from itertools import permutations

n = int(input())

ANS = set()
th1 = n // 3
th2 = (n + 2) // 3
for x in range(n + 1):
    if x**2 > th1:
        break
    for z in range(max(int(sqrt(th2)) - 5, x), n + 1):
        res = n - x * z
        if res < 0:
            break
        if x + z > 0 and res % (x + z) == 0:
            y = res // (x + z)
            if x <= y <= z:
                L = [x, y, z]
                for P in permutations(range(3)):
                    ANS.add((L[P[0]], L[P[1]], L[P[2]]))
print(len(ANS))
for x, y, z in ANS:
    print(x, y, z)