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 A175749 #21 May 05 2023 08:38:55 %S A175749 1680,2160,2640,3024,3120,3240,3696,4080,4368,4536,4560,4752,5520, %T A175749 5616,5670,5712,6000,6160,6384,6864,6960,7128,7280,7344,7440,7680, %U A175749 7728,8208,8424,8880,8910,8976,9520,9744,9840,9936,10032,10320,10368,10416,10530,10608 %N A175749 Numbers with 40 divisors. %C A175749 Numbers of the forms p^39, p^19*q^1, p^9*q^3, p^7*q^4, p^9*q^1*r^1, p^4*q^3*r^1 (A179698), and p^4*q^1*r^1*s^1 (A179693), where p, q, r, and s are distinct primes. %H A175749 T. D. Noe, <a href="/A175749/b175749.txt">Table of n, a(n) for n = 1..1000</a> %H A175749 OEIS Wiki, <a href="https://oeis.org/wiki/Index_entries_for_number_of_divisors">Index entries for number of divisors</a> %F A175749 A000005(a(n))=40. %t A175749 Select[Range[20000],DivisorSigma[0,#]==40&] (* _Vladimir Joseph Stephan Orlovsky_, May 06 2011 *) %o A175749 (PARI) is(n)=numdiv(n)==40 \\ _Charles R Greathouse IV_, Jun 19 2016 %Y A175749 Cf. A175747, A175748. %K A175749 nonn %O A175749 1,1 %A A175749 _Jaroslav Krizek_, Aug 27 2010