Refactor possible_combinations into possibleFactors
Refactor code into allFactorsFromPrimeFactors
Refactor to improve readability
Refactor to improve readability
Remove factors method from PrimeNumber
Fix issue with incorrect return from factors
Display answer in run()
Refactor to improve readability
Refactor to improve readability
Refactor to static binding
Speed process by using inject rather than collect() and sum()