print prime factors

prime_factors.rb

def get_factors(number)
  (2...number).each do |n|
    if number % n == 0
      return [get_factors(n), get_factors(number / n)]
    end
  end
  return number
end

def print_factors(number)
  p [get_factors(number)].flatten.uniq
end

print_factors 600851475143

# [71, 839, 1471, 6857]