质数因子先从最小的质因子除,能除尽就将质数分解,除不尽就增大质因子,直到最后质数缩小到与质因子相等时结束 import java.util.Scanner; public class Main{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); int num = sc.nextInt(); int k = 2; while( k <= num){ if(k == num){ ...