English

Sums of weighted averages of gcd-sum functions II

Number Theory 2019-12-24 v3

Abstract

In this paper, we establish the following two identities involving the Gamma function and Bernoulli polynomials, namely kx1ksj=1kslogΓ(jks)dkdsjfμ(d)andkx1ksj=0ks1Bmdkdsjfμ(d) \sum_{k\leq x}\frac{1}{k^s} \sum_{j=1}^{k^s}\log\Gamma\left(\frac{j}{k^s}\right) \sum_{\substack{d|k \\ d^{s}|j}}f*\mu(d) \quad {\rm and } \quad \sum_{k\leq x}\frac{1}{k^s}\sum_{j=0}^{k^{s}-1} B_{m}\sum_{\substack{d|k \\ d^{s}|j}} f*\mu(d) with any fixed integer s>1s> 1 and any arithmetical function ff. We give asymptotic formulas for them with various multiplicative functions ff. We also consider several formulas of the Dirichlet series associated with the above identities. This paper is a continuation of an earlier work of the authors.

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Cite

@article{arxiv.1801.03653,
  title  = {Sums of weighted averages of gcd-sum functions II},
  author = {Isao Kiuchi and Sumaia Saad Eddin},
  journal= {arXiv preprint arXiv:1801.03653},
  year   = {2019}
}

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17 pages