total = 0

while(true) do
  line = gets
  if line == nil then break end
  numbers = line.split(' ').map do |num| num.to_i end
  for i in (0..numbers.length - 1) do
    for j in ((i + 1)..numbers.length - 1) do
      pair = [numbers[i], numbers[j]]
      max = pair.max
      min = pair.min

      if max % min == 0 then
        total += max / min
        next
      end
    end
  end
end

puts(total)