#!/usr/bin/python3.8 import sys read = sys.stdin.buffer.read1 readline = sys.stdin.buffer.readline readlines = sys.stdin.buffer.readlines from functools import lru_cache import numpy as np MOD = 10 ** 9 + 7 N = int(read()) def prime_table(N): is_prime = np.zeros(N, np.bool) is_prime[2] = 1 is_prime[3::2] = 1 for p in range(3, N, 2): if p * p >= N: break if is_prime[p]: is_prime[p * p:: p + p] = 0 primes = np.where(is_prime)[0] return is_prime, primes def mobius_table(N, primes): mu = np.ones(N, np.int64) mu[0] = 0 for p in primes: mu[p::p] *= -1 pp = p * p if p < N: mu[pp::pp] = 0 return mu @lru_cache(None) def F(N): """return sum(|x| + |y|) for lattice points (x,y), satisfying x^2 + y^2 <= N""" x_max = int(N ** .5) x = np.arange(1, x_max + 1, dtype=np.int64) y_max = np.sqrt(N - x * x).astype(int) S_xplus = (x * (1 + 2 * y_max) % MOD).sum() % MOD return S_xplus def f(N): Nsq = int(N ** .5) is_prime, primes = prime_table(Nsq + 10) mu = mobius_table(Nsq + 10, primes) mu *= np.arange(Nsq + 10) M = int(N ** (1 / 3)) x = 0 for d in range(1, N + 1): n = N // (d * d) if n <= M: break x += mu[d] * F(n) x %= MOD for n in range(1, M + 1): dr = int((N // n) ** .5) dl = int((N // (n + 1)) ** .5) x += mu[dl + 1: dr + 1].sum() * F(n) x %= MOD return (24 * x - 16) % MOD print(f(N))