Published onNovember 30, 2014What Are Amicable Numbers?number-theorymathematicsAmicable numbers are pairs of integers where each equals the sum of the proper divisors of the other.
Published onNovember 27, 2014Deficient and Abundant Numbersnumber-theorymathematicsProper divisor sum smaller → deficient, larger → abundant
Published onNovember 26, 2014What Is a Proper Divisor?number-theorymathematicsDivisors of a number excluding itself.