https://e-sygoing.link Latest links in the Perfect Numbers category en-us Tue, 09 Jun 2026 18:37:08 -0400 https://e-sygoing.link/link/5280338-aliquot Sequences with initial term up to 10,000, by Christophe Clavier. Sun, 11 Jan 2026 03:53:58 -0500 https://e-sygoing.link/go/5280338 https://e-sygoing.link/link/5280335-amicable-numbers Observations on amicable pairs and their distribution, including Harshad and Happy Amicable pairs. Thu, 02 Oct 2025 20:42:24 -0400 https://e-sygoing.link/go/5280335 https://e-sygoing.link/link/5280343-aliquot-sequences Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software. Sun, 09 Feb 2025 11:02:28 -0500 https://e-sygoing.link/go/5280343 https://e-sygoing.link/link/5280334-on-a-generalization-of-perfect-numbers J. L. Pe introduces perfect numbers relative to an arithmetical function f. Under this scheme, the usual perfect numbers are just one among many species of "f-perfect numbers". Several open problems and examples of perfect number sets are given, as well as a few f-amicable pairs. Sat, 12 Oct 2024 13:36:19 -0400 https://e-sygoing.link/go/5280334 https://e-sygoing.link/link/5280341-aliquot-sequences Aliquot sequences arise in iterating the sum-of-divisors function s. Bosma has calculated tables up to start value 50,000 and 80 digits. Sat, 28 Sep 2024 01:24:23 -0400 https://e-sygoing.link/go/5280341 https://e-sygoing.link/link/5280332-aliquot-sequences Results and software from Paul Zimmermann, addressing the Catalan Conjecture and working on the difficult "Lehmer Five" sequences. Sun, 15 Sep 2024 13:36:12 -0400 https://e-sygoing.link/go/5280332 https://e-sygoing.link/link/5280329-aliquot-sequences Juan L. Varona's work on aliquot sequences examines sequences with start values up to 10000, and traces them to large composite values. Sat, 15 Jun 2024 04:31:45 -0400 https://e-sygoing.link/go/5280329 https://e-sygoing.link/link/5280339-perfect-number-from-mathworld Definitions and references. Thu, 18 Apr 2024 01:24:54 -0400 https://e-sygoing.link/go/5280339 https://e-sygoing.link/link/5280336-multiply-perfect-numbers Up-to-date information on multiperfect numbers and searchable database maintained by Achim Flammenkamp. Fri, 12 Apr 2024 08:59:15 -0400 https://e-sygoing.link/go/5280336 https://e-sygoing.link/link/5280342-perfect-numbers Harry J. Smith's pages of the mathematics behind perfect numbers, aliquot sequences and Mersenne numbers. Includes program listings and e-mail archives. Wed, 28 Feb 2024 18:33:46 -0500 https://e-sygoing.link/go/5280342