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Arithmetic dynamics

Aliquot sequence

 0  0 

Aliquot sum

 0  0 

Dudeney number

 0  0 

Factorion

 0  0 

Happy number

 0  0 

Kaprekar number

 0  0 

Keith number

 0  0 

Lychrel number

 0  0 

Meertens number

 0  0 

Multiply perfect number

 0  0 

Narcissistic number

 0  0 

Perfect digit-to-digit invariant

 0  0 

Perfect digital invariant

 0  0 

Self number

 0  0 

Sum-product number

 0  0 

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