<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Upper bounds for σ(n) are provided in terms of other arithmetic functions as ϕ(n), d(n), ψ(n), P(n), etc. Comparision of older results are given, too.</p></abstract>

Upper bounds for σ(n) are provided in terms of other arithmetic functions as ϕ(n), d(n), ψ(n), P(n), etc. Comparision of older results are given, too.

On certain upper bounds for the sum of divisors function σ(n)

Babeş-Bolyai University, Faculty of Mathematics and Computer Science, Romania

Sapientia Hungarian University of Transylvania, Department of Mathematics and Informatics, Romania

Acta Universitatis Sapientiae, Mathematica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

On certain upper bounds for the sum of divisors function σ(n)

Published Online: Feb 09, 2016

Page range: 265 - 277

Received: Feb 09, 2015

DOI: https://doi.org/10.1515/ausm-2015-0018

Keywords
arithmetic functions, inequalities

© 2016

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

On certain upper bounds for the sum of divisors function σ(n)

Published Online: Feb 09, 2016

Page range: 265 - 277

Received: Feb 09, 2015

DOI: https://doi.org/10.1515/ausm-2015-0018

Keywordsarithmetic functions, inequalities

© 2016

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
arithmetic functions, inequalities