import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int n = in.nextInt();
        int k = in.nextInt();

        System.out.println(core(n, k));
    }

    public static int core(int n, int k) {
        int count = 0;
        if(k == 0){
            return n*n;
        }
        for (int y = k + 1; y <= n; y++) {
            int i = n/y;
            count += i*(y-k);
            if(n%y >=k){
                count += n%y -k +1;
            }
        }
        return count;
    }
}