factor() - Will return factors of a given integer EXCLUDING 1 and the given number.
factor_include() - Will return factors of a given integer INCLUDING 1 and the given number.
-println!("{:?}", factor(144));
-Prints [2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72]
-println!("{:?}", factor_include(144));
-Prints [1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144]
*Note : Factors are returned in a vector.