import java.util.*;

public class Exercise144{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    int k = sc.nextInt();
    int max = 0;

    for(int i = 2; i <= n / 2; i++){
      if(n % i == 0){
        max = Math.max(max, i);
      }
    }
    System.out.println((max == 0) ? 1 :max);
  }
}