#include <cstdio>

using namespace std;

const int imax=1000000;
bool verifI[imax+1],verifJ[imax+1];

int main() {
    freopen("mins.in","r",stdin);
    freopen("mins.out","w",stdout);
    int imax,jmax;
    scanf("%d%d",&jmax,&imax);
    --imax;
    --jmax;
    long long ct=1ll*imax*jmax;
    for (register int i=1,multiplier=1; i<=imax; ++i,multiplier=1) {
        for (register int j=1,multiplier=1; j<=jmax; ++j,multiplier=1) {
            if (!verifJ[j] || !verifI[i]) {
                while (1ll*i*multiplier<=imax && 1ll*j*multiplier<=jmax) {
                    verifI[i*multiplier]=true;
                    verifJ[j*multiplier]=true;
                    if (multiplier>=2){
                        --ct;
                    }
                    ++multiplier;
                }
            }
        }
    }
    printf("%lld",ct);
    return 0;
}