import sys
readline=sys.stdin.readline
from collections import defaultdict

def Divisors(N):
    divisors=[]
    for i in range(1,N+1):
        if i**2>=N:
            break
        elif N%i==0:
            divisors.append(i)
    if i**2==N:
        divisors+=[i]+[N//i for i in divisors[::-1]]
    else:
        divisors+=[N//i for i in divisors[::-1]]
    return divisors

def Factorize(N):
    assert N>=1
    factors=defaultdict(int)
    for p in range(2,N):
        if p**2>N:
            break
        while N%p==0:
            factors[p]+=1
            N//=p
    if N!=1:
        factors[N]+=1
    return factors

T=int(readline())
mod=10**9+7
for t in range(T):
    N,C=map(int,readline().split())
    D=Divisors(N)
    fact=Factorize(N)
    cnt=defaultdict(int)
    for d in D:
        cnt[d]+=N//d
    for p in fact:
        for d in D:
            if d%p==0:
                cnt[d//p]-=cnt[d]
    ans=pow(C,N,mod)*N%mod
    for d,c in cnt.items():
        ans+=pow(C,d*2,mod)*c%mod
        ans%=mod
    ans*=pow(2*N,mod-2,mod)
    ans%=mod
    print(ans)