Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Explicit Formula For The Divisor Function   The details for the construction of an explicit formula for the divisors
function d(n) = #{d | n} are formalized in this article. This formula
facilitates a unified approach to the investigation of the error terms of the
divisor problem and circle problem.

24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an