from itertools import permutations


N = int(input())

ans = set()
for x in range(int(N**(1/2))+1):
    for y in range(x, int(N**(1/2))+1):
        if x == y == 0:
            continue
        if (N - x * y) % (x + y) == 0:
            z = (N - x * y) // (x + y)
            if x <= y <= z:
                l = len(set([x, y, z]))
                if l == 1:
                    ans.add((x, y, z))
                elif l == 2:
                    ans.add((x, y, z))
                    ans.add((y, z, x))
                    ans.add((z, x, y))
                else:  # l == 3
                    for i in permutations([x, y, z]):
                        ans.add(tuple(i))
print(len(ans))
for i in ans:
    print(*i)