amic.rb

def d(num)
  arr = (1..(num/2)).to_a.keep_if { |i| num % i == 0}
	arr = [1] if num == 1
	arr.inject(:+)
end

st = Time.new

amic = []

for i in 1...7500
	if i*2 < d(i*2) && i*2 == d(d(i*2))
		amic << i*2 
		amic << d(i*2)
		puts "#{i*2} - #{d(i*2)}"
		i -= ((i*2) % 1000)/2
		i += 499
		puts i
	end
end

puts amic.inject(:+)

en = Time.new - st
puts en