This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A018321 #29 Jul 08 2025 06:38:34 %S A018321 1,2,3,4,5,6,9,10,12,15,18,20,30,36,45,60,90,180 %N A018321 Divisors of 180. %C A018321 These divisors represent a special case of the "nice angles" discussed at the Geometry Center when bending generating triangles to construct polyhedra (link given below). - _Alford Arnold_, Apr 16 2000 %C A018321 180 is a highly composite number: A002182(11) = 180. - _Reinhard Zumkeller_, Jun 21 2010 %C A018321 There are 752 ways to partition 180 as a sum of some of its distinct divisors (see A033630). This is more than any smaller number (hence 180 is listed in A065218). - _Alonso del Arte_, Sep 20 2017 %H A018321 Geometry Center, <a href="http://www.scienceu.com/geometry/articles/tritile/nice.html">Triangle Tilings: Nice Angles</a> %H A018321 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018321 Divisors[180] (* _Vladimir Joseph Stephan Orlovsky_, Feb 19 2012 *) %o A018321 (PARI) divisors(180) \\ _Charles R Greathouse IV_, Jun 21 2017 %Y A018321 Cf. A018253, A018256, A018261, A018266, A018293, A018412, A018350, A018609, A018676, A178877, A178878, A165412, A178858, A178859, A178860, A178861, A178862, A178863, A178864. %K A018321 nonn,fini,full,easy %O A018321 1,2 %A A018321 _N. J. A. Sloane_