On a sequence formed by iterating a divisor operator
Bellaouar Djamel, Boudaoud Abdelmadjid, Özen Özer (2019)
Czechoslovak Mathematical Journal
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Let be the set of positive integers and let . We denote by the arithmetic function given by , where is the number of positive divisors of . Moreover, for every we denote by the sequence We present classical and nonclassical notes on the sequence , where , , are understood as parameters.