The so-called nine progressive increases may the divisor be this kind of number: This number with to 1 to 9 these nine digital compositions, each numeral just only appears time.

• 九位累进可除数.；rar - 求九位累进可除数。所谓九位累进可除数就是这样一个数： 这个数用到1到9这九个数字组成，每个数字刚好只出现一次。