Contents

# coding: utf-8
class Integer
  def powerful?
    return false unless self > 0
    divisors = self.divisors
    divisors.select {|d| d.prime? }.all?{|prime| divisors.include? (prime ** 2)}
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
numb-0.72.1	lib/numb/powerful.rb
numb-0.72.0	lib/numb/powerful.rb
numb-0.68.0	lib/numb/powerful.rb
numb-0.63.0	lib/numb/powerful.rb