56 lines
1.2 KiB
Markdown
56 lines
1.2 KiB
Markdown
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---
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id: 5900f3b11000cf542c50fec4
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challengeType: 5
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title: 'Problem 69: Totient maximum'
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videoUrl: ''
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localeTitle: 问题69大欧拉
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---
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## Description
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<section id="description"> Euler的Totient函数φ（n）[有时称为phi函数]用于确定小于n的数字的数量，这些数字是n的相对素数。例如，如1,2,4,5,7和8都小于9且相对于9，φ（9）= 6。 <p> n相对素数φ（n）n /φ（n）2 1 1 2 3 1,2 2 1.5 4 1,3 2 2 5 1,2,3,4 4 1.25 6 1,5 2 3 7 1,2， 3,4,5,6 6 1.1666 ... 8 1,3,5,7 4 2 9 1,2,4,5,7,8 6 1.5 10 1,3,7,9 4 2.5 </p><p>可以看出，对于n≤10，n = 6产生最大n /φ（n）。找到n≤1,000,000的值，其中n /φ（n）是最大值。 </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>euler69()</code>应该返回510510。
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testString: 'assert.strictEqual(euler69(), 510510, "<code>euler69()</code> should return 510510.");'
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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 euler69() {
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// Good luck!
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return true;
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}
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euler69();
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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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