| 1. | Aliquot Sequences | | | Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software.
home.t-online.de |
| 2. | 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.
www.unirioja.es |
| 3. | The Perfect Number Journey | | | A Mathematics Enrichment Workshop introducing perfect numbers. Lessons and exercises extend over several pages. Aimed at interested middle and high school students.
home1.pacific.net.sg |
| 4. | Perfect Numbers | | | A detailed history of the quest for perfect numbers, from Euclid to their present-day Mersenne discoveries.
www-history.mcs.st-and.ac.uk |
| 6. | Cubes of Perfection | | | From Ivars Peterson's MathTrek column in MAA Online. Curious relationships satisfied by perfect numbers.
www.maa.org |
| 8. | Amicable Numbers | | | Observations on amicable pairs and their distribution, including Harshad and Happy Amicable pairs.
www.shyamsundergupta.com |
| 9. | Multiply Perfect Numbers | | | Up-to-date information on multiperfect numbers and searchable database maintained by Achim Flammenkamp.
wwwhomes.uni-bielefeld.de |
| 10. | Tables of Aliquot Cycles | | | Data for various kinds up to 10^12, including unitary, infinitary, exponential, augmented and reduced varieties.
amicable.homepage.dk |
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