Given an integer N, list all prime factors of N.
There are several test cases. In each test case, there is an integer N ( 2 <= N < 1000000 ) occupied a newline.
Case 1: N<200, #test cases<=20
Case 2: N<2000, #test cases<=200
Case 3: N<200000, #test cases<=2000
Case 4: N<1000000, #test cases<=200000
List all prime factors of N in acsending order in a line. Seperate the prime factors with a space.