The maximal order of a class of multiplicative arithmetical functions

Details The maximal order of a class of multiplicative arithmetical functions The maximal order of a class of multiplicative arithmetical functions

2006-10-11

arxiv.org/abs/math/0610360v1

Annales Univ. Sci. Budapest., Sect. Comp., 22 (2003), 353-364

Mathematics

Number Theory

Scientific paper

We prove simple theorems concerning the maximal order of a large class of multiplicative functions. As an application, we determine the maximal orders of certain functions of the type $\sigma_A(n)= \sum_{d\in A(n)} d$, where A(n) is a subset of the set of all positive divisors of $n$, including the divisor-sum function $\sigma(n)$ and its unitary and exponential analogues. We also give the minimal order of a new class of Euler-type functions, including the Euler-function $\phi(n)$ and its unitary analogue.

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