diff --git a/prime_factors.rb b/prime_factors.rb
new file mode 100644
index 0000000..0faf56d
--- /dev/null
+++ b/prime_factors.rb
@@ -0,0 +1,13 @@
+require 'prime'
+
+def prime_factors(number)
+  # Thank you Ruby devs for having this amazing library!
+  Prime.prime_division(number).flat_map { |factor, power| [factor] * power }
+end
+
+p prime_factors(16)
+# => [2, 2, 2, 2]
+p prime_factors(125)
+# => [5, 5, 5]
+p prime_factors(1244)
+# => [2, 2, 311]
\ No newline at end of file