Users can visit a number of interesting figure deal, and the common denominator,...

代码说明：

用户登陆后可以对数字进行一些有趣的处理，求最大公约数，最小公倍数，同构数，水仙花数和进行数制转换-Users can visit a number of interesting figure deal, and the common denominator, least common multiple, the number of isomorphism, a few daffodils and a few system conversion