Abundant deficient and perfect number classifications

func propdivsum(n) { n.sigma - n }

var h = Hash()
{|i| ++(h{propdivsum(i) <=> i} := 0) } << 1..20000
say "Perfect: #{h{0}}    Deficient: #{h{-1}}    Abundant: #{h{1}}"

Output:

Perfect: 4    Deficient: 15043    Abundant: 4953