go top

friendly number

  • 友谊数:在数论中,友谊数是指两个正整数m和n满足σ(m)/m = σ(n)/n的关系,其中σ(n)是因数函数,则称它们是朋友,此两个整数互为友谊数。

英英释义

Friendly number

  • abstract: In number theory, friendly numbers are two or more natural numbers with a common abundancy, the ratio between the sum of divisors of a number and the number itself. Two numbers with the same abundancy form a friendly pair; n numbers with the same abundancy form a friendly n-tuple.

以上来源于: WordNet

双语例句原声例句权威例句

  • There are a number of Web sites that list environmentally friendly hotels, B&B's and lodges around the world.

    许多网站列出世界各地环保旅馆民宿旅馆。

    youdao

  • While existing cities look for ways of becoming more environmentally friendly, a number of new ones are planned that intend to be totally green.

    现存城市正在寻求加强环保的途径之时,一些新建的城市设计彻底环保的道路。

    youdao

  • There are a number of Web sites that list environmentally friendly hotels, B&B's and lodges around the world; these are a good place to start.

    网站一些环保型酒店列表可供选择。

    youdao

更多双语例句
  • Last year, two American government agencies and an international organization announced a number of policies for environmentally-friendly racing.

    VOA: special.2009.11.03

  • Which actually is son of Bonacci which is the name of his father who was apparently a very friendly guy. First of all, does anyone know what a Fibonacci number is? Wow.

    斐波纳契,它是波纳契的儿子,波纳契是它父亲的名字,听上去是个友好的男人不是吗,谁知道斐波纳契数列?

    麻省理工公开课 - 计算机科学及编程导论课程节选

更多权威例句
$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定