Introduction - If you have any usage issues, please Google them yourself
For any positive integer x, which number divisors denoted n (x). E.g., n (1) 1, n (6) 4. If a positive integer x full
Foot: for any i (0 <i <x) has n (i) <n (x), x is called emirp.
Now a given interval [a, b], please obtain the intervals so that x n (x) maximum.