定理:一个正整数 n 可以用素因子唯一表示为 p1^r1 * p2^r2 * ...
pk^rk (其中 pi 为素数) , 那么这个数的因子的个数就是,(r1+1)*(r2+1)*...*(rk+1).
理解:为什么是加1之后再相乘,因为一个数的的因子数至少为1和他自身,但因为r1,r2。。可以为0,所以因子的个数为(r1+1)。。。
拓展一下:
定理1: 一个正整数 n 可以用素...
分类:
其他好文 时间:
2014-07-26 15:32:46
阅读次数:
194
About the Book
To know more about programming, I have decided to start reading the famous Structure and Interpretation of Computer Programs (SICP, or the Wizard Book), which is first published by M...
分类:
其他好文 时间:
2014-07-26 15:32:35
阅读次数:
349
英文原文:StackOverflow Update: 560M Pageviews A Month, 25 Servers, And It's All About PerformanceStackOverflow 是一个 IT 技术问答网站,用户可以在网站上提交和回答问题。当下的 StackOver...
分类:
Web程序 时间:
2014-07-25 16:35:11
阅读次数:
469
keywords:grub1,grub2,gnome,kde,question describe:install centos7 by U disk,出现问题,解决办法:install centos7test this media &install centos7troubles shooting当...
分类:
系统相关 时间:
2014-07-25 13:55:01
阅读次数:
337
In the partime, a simle program attracted my attention whose content is to change number to english by reading rule of money.It took about one hour to deal with this question. Now the source was shar...
分类:
其他好文 时间:
2014-07-24 23:15:23
阅读次数:
280
UVA10361 - Automatic Poetry(自动作诗机)A Schuttelreim seems to be a typical German invention. The funny thing about this strange type of poetry is that if ...
分类:
其他好文 时间:
2014-07-24 10:20:13
阅读次数:
232
Problem Description
Ignatius is so lucky that he met a Martian yesterday. But he didn't know the language the Martians use. The Martian gives him a history book of Mars and a dictionary when it leave...
分类:
其他好文 时间:
2014-07-23 22:33:38
阅读次数:
281
Message Flood
Time Limit: 1500ms Memory limit: 65536K 有疑问?点这里^_^
题目描述
Well, how do you feel about mobile phone? Your answer would probably be something like that "It's so convenient and ...
分类:
其他好文 时间:
2014-07-23 17:19:52
阅读次数:
251
../表示上一级目录 ./表示当前目录 /网站的根目录绝对路径Java代码使用完整的URL地址,这种链接路径就是绝对路径,其特点是路径同链接站点的源点无关。绝对路径的例子Java代码如要建立指向about目录下的about.aspx,则链接地址为:而建立指向database.aspx文档的路径为:绝...
分类:
其他好文 时间:
2014-07-23 12:49:06
阅读次数:
194
Variety Merchandise - top directory usually found large bags attract Australia on top of the range solution for blogs and articles about the content o...
分类:
其他好文 时间:
2014-07-23 12:31:06
阅读次数:
296