56 lines
989 B
Markdown
56 lines
989 B
Markdown
---
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id: 5900f4fd1000cf542c51000f
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challengeType: 5
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videoUrl: ''
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localeTitle: 问题401：除数的平方和
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---
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## Description
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<section id="description"> 6的除数是1,2,3和6.这些数的平方和是1 + 4 + 9 + 36 = 50。 <p>设sigma2（n）代表n的除数的平方和。因此sigma2（6）= 50。 </p><p>设SIGMA2表示sigma2的和函数，即对于i = 1到n，SIGMA2（n）=Σsigma2（i）。 SIGMA2的前6个值是：1,6,16,37,63和113。 </p><p>找到SIGMA2（1015）modulo 109。 </p></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>euler401()</code>应该返回281632621。
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testString: assert.strictEqual(euler401(), 281632621);
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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 euler401() {
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// Good luck!
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return true;
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}
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euler401();
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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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