English

New recurrences for divisor sum functions and triangular numbers

Number Theory 2022-07-14 v1

Abstract

Euler discovered recurrence for divisor sum functions as a consequence of the pentagonal numbers theorem. With similar idea and also motivated by Ewell's work in 1977, we prove new recurrences for certain divisor sum functions and triangular numbers.

Keywords

Cite

@article{arxiv.2207.05831,
  title  = {New recurrences for divisor sum functions and triangular numbers},
  author = {Masato Kobayashi},
  journal= {arXiv preprint arXiv:2207.05831},
  year   = {2022}
}

Comments

6 pages

R2 v1 2026-06-25T00:51:49.819Z