bilibili哔哩哔哩校招笔试编程题 求因数最小和

public class Test{
    public static void main(String args[]){
        long num1;
        long num2;
        List<Long> sumList=new ArrayList<>();
        Scanner input=new Scanner(System.in);
        long n;

        n=input.nextInt();
        for(int i=1;i<n;i++){
            if(n%i==0){
                num1=i;
                num2=n/i;
                sumList.add(num1+num2);
            }
        }
        Collections.sort(sumList);
        if(sumList.size()==1){
            System.out.println(sumList.get(0)-1);
        }else{
            System.out.println(sumList.get(0));
        }
    }
}