#include <bits/stdc++.h>
#define ll long long
using namespace std;
ifstream f("pinex.in");
ofstream g("pinex.out");
ll a[25],sol[25];
ll A,B,t,k,sum;
void desc(ll nr)
{
    ll j=2;
    k=0;
    memset(a,0,sizeof(a));
    while(j*j<=nr&&nr>1)
    {
        if(nr%j==0)
        {
            k++;
            a[k]=j;
            while(nr%j==0) nr=nr/j;
        }
        j++;
    }
    if(nr>1)
    {
        k++;
        a[k]=nr;
    }
}
void verif(int nr)
{
    ll prod=1;
    for(int i=1; i<=nr; i++)
    {
        prod*=a[sol[i]];
    }
    if(nr%2==0) sum+=A/prod;
    else sum-=A/prod;
}
void submultimi(int n)
{
    int i,j;
    for(i=1; i<(1<<n); i++)
    {
        int p=0;
        for(j=0; j<n; j++)
            if( i & (1<<j)) sol[++p]=j+1;
        verif(p);
    }
}
int main()
{
    f>>t;
    while(t)
    {
        f>>A>>B;
        desc(B);
        sum=A;
        submultimi(k);
        g<<sum<<'\n';
        t--;
    }
    return 0;
}