#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint1000000007;
const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
//const bool debug = false;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
long long gcd(long long a, long long b) {
	if (b == 0) return a;
	else return gcd(b, a%b);
}
vector<int> f(long long n) {
	vector<int> x;
	for (long long i = 1; i*i <= n; i++) {
		if (0 == n % i) {
			x.push_back(i);
			if (n != i * i) x.push_back(n / i);
		}
	}
	return x;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int t; cin >> t;
	while (t--) {
		int n, c; cin >> n >> c;
		mint ans = 0;
		auto v = f(n);
		vector<P>vp(v.size());
		rep(i, v.size())vp[i] = { v[i],n / v[i] };
		sort(all(vp));
		rrep(i, vp.size()) {
			rrep(j, i) if (0 == vp[i].first%vp[j].first)vp[j].second -= vp[i].second;
			ans += pow_mod(c, 2 * vp[i].first, mod) * vp[i].second;
		}
		ans += pow_mod(c, n, mod)*n;
		ans /= (n * 2);
		cout << ans.val() << endl;
	}
	return 0;
}