#include <iostream>
#include <set>
#include <cstdio>
using namespace std;
int C,D;
int nrfac[1000005];
int pr[1000005];
long long rez;
int main()
{
    freopen("mins.in","r",stdin);
    freopen("mins.out","w",stdout);
    cin>>C>>D;
    C--;
    D--;
    pr[1]=D;
    rez=D;
    for(int i=2;i<=C;i++)
    {
        bool prim=(nrfac[i]==0);
        pr[i]+=D;
        for(int j=i;j<=C;j+=i)
        {
            nrfac[j]+=prim;
            pr[j]=pr[j]+(nrfac[i]%2==1 ? -1:1)*(D/i);
        }
        rez+=pr[i];
    }
    cout<<rez;
    return 0;
}