未完成です＞＜
import java.io.*;
class HW20141216{
public static void main(String[] args) throws IOException{
System.out.println("整数を入力してください。");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str=br.readLine();
int nyu = Integer.parseInt(str);
String result = new String();
System.out.print(nyu + " = ");
for(int i=2;nyu>1;i++){
if(nyu%i==0) {
if(result.length()>0){
result += " * ";
}
result += Integer.toString(i);
nyu /= i;
}
}
System.out.println(result);
}
}