#include <stdio.h>
#define NMAX 1000005
int n,m,fi[NMAX],rez=1;
int main()
{
	freopen("mins.in","r",stdin);
	freopen("mins.out","w",stdout);
	scanf("%d%d",&n,&m);
	n--; m--;
	int i,j,aux;
	if (n<m)
		aux=n,n=m,m=aux;
	for (i=2; i<=n; i++)
		fi[i]=(i-1)>=m ? i-1 : m;
	for (i=2; i<=n; i++)
		for (j=i*2; j<=n; j+=i)
			fi[j]-=fi[i];
	for (i=2; i<=n; i++)
		rez+=fi[i];
	printf("%d\n",rez);
	return 0;
}