#include <fstream>
using namespace std;
ifstream fin ("mins.in");
ofstream fout ("mins.out");
long long i,j,nrc,n,m,minim,val[1000001];
int main ()
{
    fin>>n>>m;
    n--;
    m--;
    minim=min (n,m);
    for (i=minim; i>=1; i--)
    {
        nrc=(n/i)*(m/i);
        for (j=i+i; j<=minim; j+=i)
            nrc-=val[j];
        val[i]=nrc;
    }
    fout<<val[1];
    return 0;
}