#include <fstream>

using namespace std;
ifstream fin("pinex.in");
ofstream fout("pinex.out");
long long A,B,i,t,nr,sol,x,k,D[80000],nrd,j,V[30];
bool P[1000001];
int main()
{
    P[1] = 1;
    for(i=2;i<=1000000;i++)
    {
        if(P[i] == 0)
        {
            D[++nrd] = i;
            for(j=i+i;j<=1000000;j+=i)
                P[j] = 1;
        }
    }
    fin>>t;
    while(t--)
    {
        fin>>A>>B;
        nr=0,sol=0;
        for(i=1;D[i]*D[i]<=B;i++)
        {
            if(B%D[i]==0)
            {
                V[++nr] = D[i];
                while(B%D[i]==0)
                    B/=D[i];
            }
        }
        if(B!=1)
            V[++nr] = B;
        for(i=1;i<(1<<nr);i++)
        {
            x = 1;
            k = 0;
            for(j=0;j<nr;j++)
            {
                if(i&(1<<j))
                {
                    k++;
                    x*=V[j+1];
                }
            }
            if(k&1)
                sol+=A/x;
            else
                sol-=A/x;
        }
        fout<<A-sol<<'\n';
    }
    return 0;
}