Intermediate Exercism • haskell

Perfect Numbers

Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.

Visit the perfect-numbers exercise on Exercism to read the full instructions and download the exercise files.

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module PerfectNumbers
  ( Classification(..)
  , classify
  ) where

import Data.List ( nub )

data Classification
  = Abundant
  | Deficient