N = int(input())
ans = []
for x in range(N+1):
    if 3*x*x > N:
        break
    for y in range(x, N+1):
        if x*y+y*y+y*x > N:
            break
        for z in range(y, N+1):
            if x*y+y*z+z*x > N:
                break
            if x*y+y*z+z*x == N:
                if x == y == z:
                    ans.append((x, y, z))
                elif x == y:
                    ans.append((x, y, z))
                    ans.append((x, z, y))
                    ans.append((z, x, y))
                elif y == z:
                    ans.append((x, y, z))
                    ans.append((y, x, z))
                    ans.append((y, z, x))
                else:
                    ans.append((x, y, z))
                    ans.append((x, z, y))
                    ans.append((y, x, z))
                    ans.append((y, z, x))
                    ans.append((z, x, y))
                    ans.append((z, y, x))
print(len(ans))
for a in ans:
    print(*a)