from itertools import permutations
def make_divisors_pairs(n): #約数のペアを作る O(sqrt(n))
    divisors = []
    i = 1
    while i*i <= n:
        if n % i == 0:
            divisors.append([i,n//i])
        i += 1
    return divisors

N = int(input())
ans = set()
for x in range(int((N/3)**(1/2))+10):
    for p, q in make_divisors_pairs(N+x*x):
        if p-x >= 0 and q-x >= 0:
            for per in permutations((x, p-x, q-x)):
                ans.add(per)
print(len(ans))
for a in ans:
    print(*a)