Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: When the Nontrivial, Small Divisors of a Natural Number are in
  Arithmetic Progression   Iannucci considered the positive divisors of a natural number $n$ that do not
exceed $\sqrt{n}$ and found all forms of numbers whose such divisors are in
arithmetic progression. In this paper, we generalize Iannucci's result by
excluding the trivial divisors $1$ and $\sqrt{n}$ (when $n$ is a square).
Surprisingly, the length of our arithmetic progression cannot exceed $5$.

21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th