No label defined (Q4640512)
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scientific article; zbMATH DE number 6874399
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
scientific article; zbMATH DE number 6874399 |
Statements
25 May 2018
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sum of divisors
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\(n\)-perfect number
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\(2^r\)-perfect number
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