def test_properdivisors284(self):
expected = [1, 2, 4, 71, 142]
self.assertEqual(expected, properdivisors(284))
def test_properdivisors10(self):
expected = [1, 2, 5]
self.assertEqual(expected, properdivisors(10))
def test_properdivisors11(self):
expected = [1]
self.assertEqual(expected, properdivisors(11))
def test_properdivisors9(self):
expected = [1, 3]
self.assertEqual(expected, properdivisors(9))
