2018-10-10 22:03:03 +00:00
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---
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id: 5900f4291000cf542c50ff3a
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2020-12-16 07:37:30 +00:00
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title: 问题187:半致
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2018-10-10 22:03:03 +00:00
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challengeType: 5
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videoUrl: ''
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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复合是包含至少两个素因子的数字。例如,15 = 3×5; 9 = 3×3; 12 = 2×2×3。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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在30以下有十种复合材料恰好包含两个,不一定是不同的主要因素:4,6,9,10,14,15,21,22,25,26。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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有多少复合整数,n <108,恰好有两个,不一定是不同的素因子?
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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`euler187()`应该返回17427258。
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert.strictEqual(euler187(), 17427258);
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2018-10-10 22:03:03 +00:00
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2020-08-13 15:24:35 +00:00
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