质数因子

import java.io.*;
import java.util.*;

public class Main{
    public static void main(String[] args) throws Exception{
        Scanner sc = new Scanner(System.in);
       while(sc.hasNextLong()){
            long s = sc.nextLong();
           for (int i = 2; i <= Math.sqrt(s); i++) {
                if (s % i == 0) {
                    System.out.print(i + " ");
                    s = s / i;
                    // 还需要进行 i 判断， i -- 和 i++ 进行抵消，保证为 i 
                    i--;
                }
            }
            System.out.println(s + " ");
       }
    }
}