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Proper divisors: Difference between revisions
→{{header|Ruby}}
Line 692:
(1..10).map{|n| puts "#{n}: #{n.proper_divisors}"}
puts "#{n} has #{
end</lang>
Line 718:
require "prime"
n, g = 0
(1..20000).each{|i| e = i.prime_division.inject(1){|n,g| n *
n, g = e, i if e > n}
puts "#{g} has #{n-1} proper divisors"</lang>
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