[非官方题解]AC代码

点个赞，球球求求了

#include<iostream>
using namespace std;
int main(){
    int a;
    cin>>a;
    if(a%105==0){
        cout<<"3 5 7";
    }else if(a%15==0){
        cout<<"3 5";
    }else if(a%21==0){
        cout<<"3 7";
    }else if(a%35==0){
        cout<<"5 7";
    }else if(a%3==0){
        cout<<"3";
    }else if(a%5==0){
        cout<<"5";
    }else if(a%7==0){
        cout<<"7";
    }else{
        cout<<"n";
    }return 0;
}