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 A027890 #28 Jul 08 2025 17:57:17 %S A027890 1,3,9,11,33,73,99,101,137,219,303,411,657,803,909,1111,1233,1507, %T A027890 2409,3333,4521,7227,7373,9999,10001,13563,13837,22119,30003,41511, %U A027890 66357,81103,90009,110011,124533,152207,243309,330033,456621,729927,990099,1010101 %N A027890 Divisors of 99999999. %H A027890 Nathaniel Johnston, <a href="/A027890/b027890.txt">Table of n, a(n) for n = 1..48</a> (full sequence) %H A027890 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A027890 Divisors[99999999] (* _Harvey P. Dale_, Jul 09 2014 *) %o A027890 (PARI) divisors(99999999) \\ _Michel Marcus_, Jul 08 2014 %K A027890 nonn,fini,full,easy %O A027890 1,2 %A A027890 _N. J. A. Sloane_