将一个正整数分解质因数。例如：输入90,打印出90=2*3*3*5。 -A positive integer decomposition of the quality factor. For example: input 90, print 90=2*3*3*5.

java小程序，用来提取质因数，基础学习演示代码-Java small program, to extract the quality factor, basic learning demo code