#include <stdio.h>
#include <math.h>

int n, k;
long int number;
long int faktorial(int f)
{
	long int number = 1;
	for (int i = 1; i <= f; i++)
	{
		number *= i;
	}
	return number;
}
int del()
{
	int found = 2;
	for (int i = 2; i <= (long int)(number/2) ; i++)
	{
		if ((number % i) == 0)
		{found++;
		//	printf("%ld %d\n", number, i);
		}
	}
	return found;
}

int main(void)
{
	while (scanf("%d %d", &n, &k) == 2)
	{
		number = 1;
		for (int i = n - k + 1; i <= n; i++)
		{
			number *= i;
		}
		number = (long int)(number / faktorial(k));
		//printf("%ld: %ld\n", number, del());
		printf("%d\n", del());
	}
	return 0;
}