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path: root/2018/February/Platinum/gymnasts.cpp
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#include <algorithm>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cstring>
#define init_io(pname) ifstream cin((string)pname+".in"); ofstream cout((string)pname+".out"); ios_base::sync_with_stdio(false); cin.tie(0)
#define FOR(i, a, b, in) for (int i = (a); i < (b); i += in)
#define REP(i, a, b) for (int i = (a); i < (b); i++)
#define RFOR(i, a, b, in) for (int i = (a) - 1; i >= (b); i -= in)
#define RREP(i, a, b) for (int i = (a) - 1; i >= (b); i--)
#define trav(a, x) for (auto& a : x)
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rsz resize
#define mem(a, b) memset(a, (b), sizeof(a))
using namespace std;
typedef string str;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii; typedef pair<ll, ll> pl; typedef pair<ld, ld> pd;
typedef vector<int> vi; typedef vector<ll> vl; typedef vector<ld> vd;
typedef vector<ii> vii; typedef vector<pl> vpl; typedef vector<pd> vpd;
constexpr auto INF = (int)1e9;
constexpr auto LINF = (ll)1e18;

template<int p> struct FF {
	ll val;

	FF(const ll x = 0) { val = (x % p + p) % p; }

	bool operator==(const FF<p>& other) const { return val == other.val; }
	bool operator!=(const FF<p>& other) const { return val != other.val; }

	FF operator+() const { return val; }
	FF operator-() const { return -val; }

	FF& operator+=(const FF<p>& other) { val = (val + other.val) % p; return *this; }
	FF& operator-=(const FF<p>& other) { *this += -other; return *this; }
	FF& operator*=(const FF<p>& other) { val = (val * other.val) % p; return *this; }
	FF& operator/=(const FF<p>& other) { *this *= other.inv(); return *this; }

	FF operator+(const FF<p>& other) const { return FF(*this) += other; }
	FF operator-(const FF<p>& other) const { return FF(*this) -= other; }
	FF operator*(const FF<p>& other) const { return FF(*this) *= other; }
	FF operator/(const FF<p>& other) const { return FF(*this) /= other; }

	static FF<p> pow(const FF<p>& a, ll b) {
		if (!b) return 1;
		return pow(a * a, b >> 1) * (b & 1 ? a : 1);
	}

	FF<p> pow(const ll b) const { return pow(*this, b); }
	FF<p> inv() const { return pow(p - 2); }
};

template<int p> FF<p> operator+(const ll lhs, const FF<p>& rhs) { return FF<p>(lhs) += rhs; }
template<int p> FF<p> operator-(const ll lhs, const FF<p>& rhs) { return FF<p>(lhs) -= rhs; }
template<int p> FF<p> operator*(const ll lhs, const FF<p>& rhs) { return FF<p>(lhs) *= rhs; }
template<int p> FF<p> operator/(const ll lhs, const FF<p>& rhs) { return FF<p>(lhs) /= rhs; }

typedef FF<1000000007> MODint;


MODint phi(ll n) {
	MODint ret = n;
	for (ll p = 2; p * p <= n; p++) {
		if (n % p == 0) ret -= ret / p;
		while (n % p == 0) n /= p;
	}
	if (n > 1) ret -= ret / n;
	return ret;
}

int main() {
	init_io("gymnasts");

	ll N;
	cin >> N;
	MODint ans = phi(N) + 1;
	for (ll i = 2; i * i <= N; i++) {
		if (N % i == 0) ans += (MODint(2).pow(i) - 1) * phi(N / i) + (i * i < N) * (MODint(2).pow(N / i) - 1) * phi(i);
	}
	cout << ans.val << endl;
}