62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
---
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id: 5900f3811000cf542c50fe94
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challengeType: 5
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title: 'Problem 21: Amicable numbers'
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videoUrl: ''
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localeTitle: 问题21：友好的数字
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---
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## Description
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<section id="description">设d（ <var>n</var> ）定义为<var>n</var>的适当除数之<var>和</var> （小于<var>n的</var>数均匀分成<var>n</var> ）。如果d（ <var>a</var> ）= <var>b</var>并且d（ <var>b</var> ）= <var>a</var> ，其中<var>a</var> ≠ <var>b</var> ，则<var>a</var>和<var>b</var>是友好对，并且<var>a</var>和<var>b</var>中的每<var>一个</var>被称为友好数字。例如，220的适当除数是1,2,4,5,10,11,20,22,44,55和110;因此d（220）= 284. 284的适当除数是1,2,4,71和142;所以d（284）= 220.评估<var>n</var>下所有友好数字的总和。 </section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>sumAmicableNum(1000)</code>应返回504。
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testString: 'assert.strictEqual(sumAmicableNum(1000), 504, "<code>sumAmicableNum(1000)</code> should return 504.");'
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- text: <code>sumAmicableNum(2000)</code>应该返回2898。
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testString: 'assert.strictEqual(sumAmicableNum(2000), 2898, "<code>sumAmicableNum(2000)</code> should return 2898.");'
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- text: <code>sumAmicableNum(5000)</code>应该返回8442。
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testString: 'assert.strictEqual(sumAmicableNum(5000), 8442, "<code>sumAmicableNum(5000)</code> should return 8442.");'
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- text: <code>sumAmicableNum(10000)</code>应返回31626。
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testString: 'assert.strictEqual(sumAmicableNum(10000), 31626, "<code>sumAmicableNum(10000)</code> should return 31626.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function sumAmicableNum(n) {
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// Good luck!
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return n;
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}
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sumAmicableNum(10000);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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