题解 | #质数因子#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        long a = in.nextLong();
        long b = 2L;
        // 判断是否质数 X^(1/2)
        while(b<=Math.sqrt(a)) {
            if(a%b==0) {
                System.out.print(b+" ");
                a = a/b;
            } else{
                b++;
            }
        }
        System.out.print(a);
    }

}