ICPC 2013 2013 World Finals St. Petersburg HOSTED BY ITMO Problem D Factors Time Limit: 2 seconds The fundamental theorem of arithmetic states that every integer greater than 1 can be uniquely repre- sented as a product of one or more primes. While unique, several arrangements of the prime factors may be possible. For example: 10 = 2 · 5 20 = 2 · 2 · 5 =5·2 =2·5·2 =5·2·2 Let f (k) be the number of different arrangements of the prime factors of k. So f (10) = 2 and f (20) = 3. Given a positive number n, there always exists at least one number k such that f (k) = n. We want to know the smallest such k. Input The input consists of at most 1 000 test cases, each on a separate line. Each test case is a positive integer n < 263 . Output For each test case, display its number n and the smallest number k > 1 such that f (k) = n. The numbers in the input are chosen such that k < 263 . Sample Input 1 Sample Output 1 1 1 2 2 2 6 3 3 12 105 105 720 This page is intentionally left blank.