def problem12():
""" Highly divisible triangular number
What is the value of the first triangle number to have over five hundred divisors?
"""
for triangle_number in mathhelper.triangle_list(None):
if mathhelper.factor_count(triangle_number) > 500:
return triangle_number
def test_factor_count(self):
self.assertEqual(mathhelper.factor_count(-5), 2)
self.assertEqual(mathhelper.factor_count(-4), 3)
self.assertEqual(mathhelper.factor_count(-3), 2)
self.assertEqual(mathhelper.factor_count(-2), 2)
self.assertEqual(mathhelper.factor_count(-1), 1)
self.assertEqual(mathhelper.factor_count(0), 0)
self.assertEqual(mathhelper.factor_count(1), 1)
self.assertEqual(mathhelper.factor_count(2), 2)
self.assertEqual(mathhelper.factor_count(4), 3)
self.assertEqual(mathhelper.factor_count(5), 2)
self.assertEqual(mathhelper.factor_count(6), 4)
self.assertEqual(mathhelper.factor_count(21), 4)
self.assertEqual(mathhelper.factor_count(28), 6)
self.assertEqual(mathhelper.factor_count(-5, True), 1)
self.assertEqual(mathhelper.factor_count(-4, True), 2)
self.assertEqual(mathhelper.factor_count(-3, True), 1)
self.assertEqual(mathhelper.factor_count(-2, True), 1)
self.assertEqual(mathhelper.factor_count(-1, True), 0)
self.assertEqual(mathhelper.factor_count(0, True), 0)
self.assertEqual(mathhelper.factor_count(1, True), 0)
self.assertEqual(mathhelper.factor_count(2, True), 1)
self.assertEqual(mathhelper.factor_count(4, True), 2)
self.assertEqual(mathhelper.factor_count(5, True), 1)
self.assertEqual(mathhelper.factor_count(6, True), 3)
self.assertEqual(mathhelper.factor_count(21, True), 3)
self.assertEqual(mathhelper.factor_count(28, True), 5)
