The Fifth Unitary Perfect Number
| Autor: | Charles R. Wall |
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| Rok vydání: | 1975 |
| Předmět: | |
| Zdroj: | Canadian Mathematical Bulletin. 18:115-122 |
| ISSN: | 1496-4287 0008-4395 |
| DOI: | 10.4153/cmb-1975-021-9 |
| Popis: | A divisor d of a positive integer n is a unitary divisor if d and n/d are relatively prime. An integer is said to be unitary perfect if it equals the sum of its proper unitary divisors. Subbarao and Warren [2] gave the first four unitary perfect numbers: 6, 60, 90 and 87360. In 1969,1 reported [3] thatis also unitary perfect. The purpose of this paper is to show that this last number, which for brevity we denote by W, is indeed the next unitary perfect number after 87360. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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