Add Algorithms to Math with tests (#429)

* chore: add area and area test

* chore: add armstrong number

* chore: add factors

* chore: add perfect cube

* chore: add perfect square

* chore: add perfect number

* chore: add number of digits

* chore: fix according to standardjs

* chore: remove conflicting files

Maths/Factors.js

@@ -0,0 +1,16 @@
+/**
+ * Author: dephraiim
+ * License: GPL-3.0 or later
+ *
+ * More on Factors:
+ *      https://www.mathsisfun.com/definitions/factor.html
+ *
+ */
+
+const factorsOfANumber = (number = 0) => {
+  return Array.from(Array(number + 1).keys()).filter(
+    (num) => number % num === 0
+  )
+}
+
+export { factorsOfANumber }