// Template {{{
#include <bits/stdc++.h>
#define REP(i,n) for(int i=0; i<(int)(n); ++i)
using namespace std;
typedef long long LL;

#ifdef LOCAL
#include "contest.h"
#else
#define dump(x) 
#endif

const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
inline bool valid(int x, int w) { return 0 <= x && x < w; }

void iostream_init() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.setf(ios::fixed);
    cout.precision(12);
}
//}}}

// ModInt (ref. anta) {{{
template<int MOD>
struct ModInt{
    static const int Mod = MOD;
    unsigned val;
    ModInt():val(0){}
    ModInt(unsigned x):val(x%MOD){}
    ModInt(signed x) {
        int y = x % MOD;
        if(y < 0) y += MOD;
        val = y;
    }
    ModInt(signed long long x) {
        int y = (int)(x % MOD);
        if(y < 0) y += MOD;
        val = y;
    }

    ModInt &operator+=(ModInt rhs) {
        val += rhs.val;
        if(val >= MOD) val -= MOD;
        return *this;
    }
    ModInt &operator-=(ModInt rhs) {
        val += MOD - rhs.val;
        if(val >= MOD) val -= MOD;
        return *this;
    }
    ModInt &operator*=(ModInt rhs) {
        val = (unsigned)((unsigned long long)val * rhs.val % MOD);
        return *this;
    }
    ModInt &operator/=(ModInt rhs) {
        return *this *= rhs.inv();
    }

    ModInt inv() const {
        signed a = val, b = MOD, u = 1, v = 0;
        while(b) {
            signed t = a / b;
            a -= t * b; std::swap(a, b);
            u -= t * v; std::swap(u, v);
        }
        if(u < 0) u += MOD;
        ModInt res;
        res.val = u;
        return res;
    }

    ModInt operator+(ModInt rhs) const {
        return ModInt(*this) += rhs;
    }
    ModInt operator-(ModInt rhs) const {
        return ModInt(*this) -= rhs;
    }
    ModInt operator*(ModInt rhs) const {
        return ModInt(*this) *= rhs;
    }
    ModInt operator/(ModInt rhs) const {
        return ModInt(*this) /= rhs;
    }

    // compare
    bool operator==(ModInt rhs) const {
        return val == rhs.val;
    }
    bool operator!=(ModInt rhs) const {
        return val != rhs.val;
    }
    bool operator< (ModInt rhs) const {
        return val <  rhs.val;
    }
    bool operator<=(ModInt rhs) const {
        return val <= rhs.val;
    }
    bool operator> (ModInt rhs) const {
        return val >  rhs.val;
    }
    bool operator>=(ModInt rhs) const {
        return val >= rhs.val;
    }
};
template<int MOD>
ostream& operator << (ostream& os, const ModInt<MOD> m) {
    return os << m.val;
}
template<int MOD, typename T>
ModInt<MOD> pow(ModInt<MOD> a, T b) {
    if(b == 0) {
        return 1;
    } else {
        auto w = pow(a*a, b/2);
        if(b&1) w *= a;
        return w;
    }
}
// }}}
typedef ModInt<1000000007> mint;

vector<LL> divisor(LL N) {
    vector<LL> res;
    for(LL i = 1; i*i <= N; i++) {
        if(N % i != 0) continue;
        res.push_back(i);
        if(i != N/i) res.push_back(N/i);
    }
    sort(res.begin(), res.end());
    return res;
}

int main(){
    iostream_init();
    LL N, K;
    cin >> N >> K;

    auto divs = divisor(N);
    map<LL, mint> f;

    for(auto x : divs) {
        f[x] += pow(mint(K), (x+1)/2);
        for(auto y : divs) {
            if(y < x && x % y == 0) {
                f[x] -= f[y];
            }
        }
    }

    mint res = 0;
    for(auto x : divs) {
        res += f[x] * mint((x % 2 == 0 ? x/2 : x));
    }

    cout << res << endl;
    return 0;
}



Measured memory_bytes: 384