#include <bits/stdc++.h>
#include <atcoder/modint>
using namespace std;
using ll = long long;
using mint = atcoder::modint;

int main() {
    ll x,y,m; cin >> x >> y >> m;
    mint::set_mod(m);
    mint ans = 0;
    ll mx = max(x, y) / 2 + 1;
    for (ll m=0; m<=mx; m++) {
        for (ll n=m+1; n<=mx; n++) {
            if (m % 2 == n % 2 || gcd(n, m) != 1) continue;
            ll ai = n*n - m*m;
            ll bi = 2*n*m;
            if (ai > mx || bi > mx) break;
            ll mul = 1;
            while (mul*max(ai, bi) <= mx) {
                ll a = ai*mul;
                ll b = bi*mul;
                if (a*2 < x && b*2 < y) {
                    if (b == 0) ans += (x - 2 * a) * (y - 2 * b) * 2;
                    else ans += (x - 2 * a) * (y - 2 * b) * 4;
                }
                if (a*2 < y && b*2 < x) {
                    if (b == 0) ans += (y - 2 * a) * (x - 2 * b) * 2;
                    else ans += (y - 2 * a) * (x - 2 * b) * 4;
                }
                mul++;
            }
        }
    }
    cout << ans.val() << "\n";
}