题解 | #质数因子#java 递归解法

```
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
public class Main {
public static void main(String[] args) throws IOException {
Scanner scanner = new Scanner(System.in);
long num = scanner.nextLong();
handle(num);
}
public static void handle(long num){
long k = (long) Math.sqrt(num);
for (int i = 2; i <= k; i++) {
while (num%i==0){
System.out.print(i+" ");
num=num/i;
handle(num);
return;
}
if (i==k){
System.out.print(num);
}
}
}
}