题解 | #质数因子#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        long number = in.nextLong();
	  // 只需计算开平方次，如果此时数字还没除数，则其为质数
        long n = (long)Math.sqrt(number);
        for (long i=2; i<=n;i++){
            while(number%i==0){
                System.out.print(i+" ");
                number/=i;
            }
        }
	  // 其为质数
        System.out.print(number==1?"":number+" ");
    }
}