N = int(input())
results = []
for x in range(N+1):
    for y in range(N+1):
        if x + y == 0:
            continue
        z = N - x*y
        if z >= 0 and z % (x+y) == 0:
            results.append((x, y, z // (x+y)))
print(len(results))
for result in results:
    print(*result)