namespace AtCoder;

#nullable enable

using System.Numerics;

static class Extensions
{
    public static T[] Repeat<T>(this int time, Func<T> F) => Enumerable.Range(0, time).Select(_ => F()).ToArray();
}

class AtCoder
{
    object? Solve()
    {
        var x = Int();
        var y = Int();
        var z = Math.Max(x, y);
        var m = Int();
        var ans = 0L;
        long GCD(long i, long j) => j == 0 ? i : GCD(j, i % j);
        long F(long a, long b)
        {
            Int128 t = Int128.MaxValue;
            if (a > 0)
            {
                var sx = x / a;
                if (sx < t) t = sx;
            }
            if (b > 0)
            {
                var sy = y / b;
                if (sy < t) t = sy;
            }
            var res = t * x * y % m;
            var t2 = t * (t + 1) * (t * 2 + 1) / 6 % m;
            var t1 = t * (t + 1) / 2 % m;
            res += t2 * a * b - t1 * (x * b + y * a);
            res %= m;
            if (res < 0) res += m;
            return (long)res;
        }
        for (var i = 0L; i <= z; i++) for (var j = 0L; j < i; j++)
        {
            if ((i + j) % 2 == 0) continue;
            var au = i * j * 2 * 2;
            var bu = (i * i - j * j) * 2;
            if (x < au && y < au && x < bu && y < bu) break;
            if (GCD(i, j) != 1) continue;
            ans = (ans + F(au, bu) + F(bu, au)) % m;
        }
        return ans * 2 % m;
    }

    public static void Main() => new AtCoder().Run();
    public void Run()
    {
        var res = Solve();
        if (res != null)
        {
            if (res is bool yes) res = yes ? "Yes" : "No";
            sw.WriteLine(res);
        }
        sw.Flush();
    }

    string[] input = Array.Empty<string>();
    int iter = 0;
    readonly StreamWriter sw = new(Console.OpenStandardOutput()) { AutoFlush = false };

    string String()
    {
        while (iter >= input.Length) (input, iter) = (Console.ReadLine()!.Split(' '), 0);
        return input[iter++];
    }
    T Input<T>() where T : IParsable<T> => T.Parse(String(), null);
    int Int() => Input<int>();
    void Out(object? x, string? separator = null)
    {
        separator ??= Environment.NewLine;
        if (x is System.Collections.IEnumerable obj and not string)
        {
            var firstLine = true;
            foreach (var item in obj)
            {
                if (!firstLine) sw.Write(separator);
                firstLine = false;
                sw.Write(item);
            }
        }
        else sw.Write(x);
        sw.WriteLine();
    }
}