arithmetic-dynamics

Articles

• Perfect digit-to-digit invariantMunchausen number
• Dudeney numberSequence in number theory
• Aliquot sumSum of all proper divisors of a natural number
• Self numberType of natural number
• Abundant numberNumber that is less than the sum of its proper divisors
• Keith numberType of number introduced by Mike Keith
• Betrothed numbersType of positive integer pairs
• Untouchable numberNumber that cannot be written as an aliquot sum
• Deficient numberNumber that is more than the sum of its proper divisors
• Happy numberNumbers with a certain property involving recursive summation
• Narcissistic numberConcept in number theory
• Perfect digit-to-digit invariantMunchausen number
• Sum-product numberNumber equal to the product of the sum and product of its digits
• FactorionNumber that is the sum of the factorials of its digits
• Amicable numbersPair of integers related by their divisors
• Perfect digit-to-digit invariantMunchausen number
• Dudeney numberSequence in number theory
• Untouchable numberNumber that cannot be written as an aliquot sum
• Perfect digit-to-digit invariantMunchausen number
• 196 (number)
• Almost perfect numberNumbers whose sum of divisors is twice the number minus 1
• Dudeney numberSequence in number theory
• Dudeney numberSequence in number theory
• Aliquot sequenceMathematical recursive sequence
• Multiply perfect numberNumber whose divisors add to a multiple of that number
• Meertens numberNumber that is its own Gödel number