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[perfect-numbers] Join broken line and add colon #2318

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merged 4 commits into from
Sep 7, 2023
Merged

[perfect-numbers] Join broken line and add colon #2318

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6ad0fd6
Join broken line and add colon
habere-et-dispertire Sep 7, 2023
96ff595
Use backticks on inline math
habere-et-dispertire Sep 7, 2023
659a4d5
backtick 15, remove parentheses
habere-et-dispertire Sep 7, 2023
2e4d903
Add fullstop.
habere-et-dispertire Sep 7, 2023
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5 changes: 2 additions & 3 deletions exercises/perfect-numbers/description.md
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# Description

Determine if a number is perfect, abundant, or deficient based on
Nicomachus' (60 - 120 CE) classification scheme for positive integers.
Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.

The Greek mathematician [Nicomachus][nicomachus] devised a classification scheme for positive integers, identifying each as belonging uniquely to the categories of **perfect**, **abundant**, or **deficient** based on their [aliquot sum][aliquot-sum].
The aliquot sum is defined as the sum of the factors of a number not including the number itself.
For example, the aliquot sum of 15 is (1 + 3 + 5) = 9
For example, the aliquot sum of `15` is `1 + 3 + 5 = 9`
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- **Perfect**: aliquot sum = number
- 6 is a perfect number because (1 + 2 + 3) = 6
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