#define DM 1000001
#define DN 12
#include <bitset>
#include <cstring>
#include <fstream>
#include <vector>
using namespace std;
 
ifstream fi ("mins.in");
ofstream fo ("mins.out");
bitset <DM> bs;
int a, b, d, aux, rez, mltm, smn;
long long sol;
vector <int> dv[DM];
 
int main()
{
    //ciur
    for (int i = 2; i*i < DM; ++i)
        if (!bs[i])
        {
            dv[i].push_back(i);
            for (int j = i*2; j < DM; j += i)
            {
                dv[j].push_back(i);
                dv[j].shrink_to_fit();
                bs[j] = 1;
            }
        }
 
    fi >> a >> d;
    --a;
    --d;
    if (a < d)
        swap(a, d);
    for (int i = 2; i <= d; ++i)
    {
        rez = 0;
        b = i;
        //pinex
        mltm = (1 << dv[i].size()) - 1;
        for (int j = 1; j <= mltm; ++j)
        {
            aux = 1;
            smn = 0;
            for (int k = 0; k < dv[i].size(); ++k)
                if (j&(1 << k))
                {
                    aux *= dv[i][k];
                    ++smn;
                }
            if (smn&1)
                rez += a/aux;
            else
                rez -= a/aux;
        }
        sol += a - rez;
    }
    fo << sol + a;
    return 0;
}