No label defined (Q4618498)
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scientific article; zbMATH DE number 7012782
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
scientific article; zbMATH DE number 7012782 |
Statements
5 February 2019
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abundancy ratio
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abundancy index
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sum of divisors
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perfect numbers
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friendly integer
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