摘要: A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16... 阅读全文
posted @ 2018-08-12 13:29 浮生惘语 阅读(125) 评论(0) 推荐(0) 编辑