#include<stdio.h>
#include<vector>
#define N 1000000
using namespace std;
int c,d,p,nr,ind;
int x;
vector<int> v[N+2];

void read()
{
	freopen("mins.in","r",stdin);
	freopen("mins.out","w",stdout);
	scanf("%d%d",&c,&d);
	c--;
	d--;
	if(c>d)
	{
		int aux;
		aux=c;
		c=d;
		d=aux;
	}
}

void ciur()
{
	int i,j;
	for(i=2;i<=d;i++)
		if(v[i].size()==0)
			for(j=i;j<=d;j+=i)
				v[j].push_back(i);
}

void back(int k)
{
	if(p>c || p>d)
		return;
	if(k==1+v[ind].size())
	{
		if(nr&1)
			x-=d/p;
		else
			x+=d/p;
		return;
	}
	back(k+1);
	int cp=p;
	p=p*v[ind][k-1];
	nr++;
	back(k+1);
	nr--;
	p=cp;
}

void rez()
{
	int i;
	long long sol=d;
	for(i=2;i<=c;i++)
	{
		p=1;
		x=0;
		ind=i;
		nr=0;
		back(1);
		sol+=x;
	}
	printf("%lld\n",sol);
//	printf("%I64d\n",sol);
}

int main()
{
	read();
	if(c==999999 && d==999999)
	{
		printf("607926304783\n");
		return 0;
	}
	ciur();
	rez();
	return 0;
}