62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
---
|
||
id: 5900f3811000cf542c50fe94
|
||
challengeType: 5
|
||
title: 'Problem 21: Amicable numbers'
|
||
videoUrl: ''
|
||
localeTitle: 问题21:友好的数字
|
||
---
|
||
|
||
## Description
|
||
<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>
|
||
|
||
## Instructions
|
||
<section id="instructions">
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: <code>sumAmicableNum(1000)</code>应返回504。
|
||
testString: 'assert.strictEqual(sumAmicableNum(1000), 504, "<code>sumAmicableNum(1000)</code> should return 504.");'
|
||
- text: <code>sumAmicableNum(2000)</code>应该返回2898。
|
||
testString: 'assert.strictEqual(sumAmicableNum(2000), 2898, "<code>sumAmicableNum(2000)</code> should return 2898.");'
|
||
- text: <code>sumAmicableNum(5000)</code>应该返回8442。
|
||
testString: 'assert.strictEqual(sumAmicableNum(5000), 8442, "<code>sumAmicableNum(5000)</code> should return 8442.");'
|
||
- text: <code>sumAmicableNum(10000)</code>应返回31626。
|
||
testString: 'assert.strictEqual(sumAmicableNum(10000), 31626, "<code>sumAmicableNum(10000)</code> should return 31626.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function sumAmicableNum(n) {
|
||
// Good luck!
|
||
return n;
|
||
}
|
||
|
||
sumAmicableNum(10000);
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|