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							|  |  |  |  | id: 5900f50f1000cf542c510021 | 
					
						
							|  |  |  |  | challengeType: 5 | 
					
						
							|  |  |  |  | title: 'Problem 418: Factorisation triples' | 
					
						
							|  |  |  |  | videoUrl: '' | 
					
						
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										 |  |  |  | localeTitle: 问题418:三重分解 | 
					
						
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											2018-10-10 18:03:03 -04:00
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							|  |  |  |  | ## Description
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										 |  |  |  | <section id="description"> | 
					
						
							|  |  |  |  | 令n为正整数。 在以下情况下,整数三元组(a,b,c)称为n的分解三元组: | 
					
						
							|  |  |  |  |   a·b·c = n。 | 
					
						
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							|  |  |  |  | 将f(n)定义为n的因式分解三元组(a,b,c)的a + b + c,使c / a最小。 可以证明这一三元组是独特的。 | 
					
						
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							|  |  |  |  | 例如,f(165)= 19,f(100100)= 142,f(20!)= 4034872。 | 
					
						
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							|  |  |  |  | 查找f(43!)。 | 
					
						
							|  |  |  |  | </section> | 
					
						
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							|  |  |  |  | ## Instructions
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										 |  |  |  | <section id="instructions"> | 
					
						
							|  |  |  |  | </section> | 
					
						
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							|  |  |  |  | ## Tests
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							|  |  |  |  | <section id='tests'> | 
					
						
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							|  |  |  |  | ```yml | 
					
						
							|  |  |  |  | tests: | 
					
						
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										 |  |  |  |   - text: <code>euler418()</code>应该返回1177163565297340400。 | 
					
						
							|  |  |  |  |     testString: assert.strictEqual(euler418(), 1177163565297340400); | 
					
						
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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 | 
					
						
							|  |  |  |  | function euler418() { | 
					
						
							|  |  |  |  |   // Good luck! | 
					
						
							|  |  |  |  |   return true; | 
					
						
							|  |  |  |  | } | 
					
						
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							|  |  |  |  | euler418(); | 
					
						
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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 | 
					
						
							|  |  |  |  | // solution required | 
					
						
							|  |  |  |  | ``` | 
					
						
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							|  |  |  |  | /section> |