abranhe · higorsnt · Oct 5, 2019
diff --git a/allalgorithms/math/__init__.py b/allalgorithms/math/__init__.py
@@ -0,0 +1,2 @@
+from .max_numbers import find_max
+from .kth_smallest_divisor import kth_divisor
diff --git a/allalgorithms/math/kth_smallest_divisor.py b/allalgorithms/math/kth_smallest_divisor.py
@@ -0,0 +1,29 @@
+# -*- coding: UTF-8 -*-
+#
+# Find the k-th smallest divisor of a natural number.
+# The All ▲lgorithms library for python
+#
+# Contributed by: Higor Santos
+# Github: @higorsnt
+#
+
+
+def kth_divisor(number, k):
+    vector1 = []
+    vector2 = []
+
+    for i in range(1, int(number ** 0.5) + 1):
+        if number % i == 0:
+            vector1.append(i)
+
+            if i != int(number ** 0.5) + 1:
+                vector2.append(number // i)
+    vector2.reverse()
+
+    if k > (len(vector1) + len(vector2)):
+        raise ValueError("Doesn't Exist")
+    else:
+        if (k - 1) < len(vector1):
+            return vector1[k - 1]
+        else:
+            return vector2[k - len(vector1) - 1]
diff --git a/allalgorithms/numeric/max_numbers.py → allalgorithms/math/max_numbers.py b/allalgorithms/numeric/max_numbers.py → allalgorithms/math/max_numbers.py
diff --git a/allalgorithms/numeric/__init__.py b/allalgorithms/numeric/__init__.py
diff --git a/tests/test_math.py b/tests/test_math.py
@@ -0,0 +1,37 @@
+import unittest
+
+from allalgorithms.math import (
+    find_max,
+    kth_divisor
+)
+
+
+class TestMath(unittest.TestCase):
+
+    def test_find_max_value(self):
+        test_list = [3, 1, 8, 7, 4]
+        self.assertEqual(8, find_max(test_list))
+
+    def test_find_kth_divisor_of_prime_number(self):
+        self.assertEqual(1, kth_divisor(257, 1))
+        self.assertEqual(257, kth_divisor(257, 2))
+        with self.assertRaises(ValueError):
+            kth_divisor(257, 3)
+
+    def test_find_kth_divisor_of_even_number(self):
+        self.assertEqual(7, kth_divisor(728, 4))
+        self.assertEqual(91, kth_divisor(728, 12))
+        self.assertEqual(364, kth_divisor(728, 15))
+        with self.assertRaises(ValueError):
+            kth_divisor(728, 17)
+
+    def test_find_kth_divisor_of_odd_number(self):
+        self.assertEqual(459, kth_divisor(162027, 9))
+        self.assertEqual(18003, kth_divisor(162027, 14))
+        self.assertEqual(162027, kth_divisor(162027, 16))
+        with self.assertRaises(ValueError):
+            kth_divisor(162027, 17)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_numeric.py b/tests/test_numeric.py
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		from .max_numbers import find_max
		from .kth_smallest_divisor import kth_divisor