题解 | #质数因子#

import java.util.Scanner;
public class Main {
    public void resolve(int num){
        if(isPrimeNumber(num)){
            System.out.print(num);
            return;
        }
        for(int i = 2; i * i <= num; i++){
            if(num % i == 0){
                System.out.print(i + " ");
                num /= i;
                if(isPrimeNumber(num) == false){
                    resolve(num);
                    break;
                }
                else{
                    System.out.print(num + " ");
                    return;   
                }
            }
            
        }
    }
    public boolean isPrimeNumber(int num){
        if(num % 2 == 0){
            return false;
        }
        for(int i = 3; i * i <= num; i += 2){
            if(num % i == 0){
                return false;
            }
        }
        return true;
    }
    public static void main(String []args) {
        Scanner in = new Scanner(System.in);
        int temp = in.nextInt();
        Main test = new Main();
        if(1 <= temp && temp <= 2000000014){
            test.resolve(temp);
        }
    }
}