import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	void run() {
		Scanner sc = new Scanner(System.in);
		boolean[] isPrime = new boolean[1263];
		int[] g = new int[isPrime.length];
		Arrays.fill(isPrime, true);
		isPrime[0] = isPrime[1] = false;
		int cnt = 0;
		for (int i = 2; i < isPrime.length; ++i) {
			if (!isPrime[i])
				continue;
			for (int j = 2 * i; j < isPrime.length; j += i) {
				isPrime[j] = false;
			}
			if (i * i <= isPrime.length)
				for (int j = i; j < isPrime.length; j += i) {
					g[j] |= 1 << cnt;
				}
			++cnt;
		}
		ArrayList<Integer> plist = new ArrayList<>();
		for (int i = 0; i < isPrime.length; ++i) {
			if (isPrime[i])
				plist.add(i);
		}
		int N = sc.nextInt();
		boolean[] vis = new boolean[N + 1];
		long[] dp = new long[1 << 11];
		for (int i = N; i > plist.get(10); --i) {
			if (!isPrime[i])
				continue;
			long[] ndp = Arrays.copyOf(dp, dp.length);
			for (int j = i; j <= N; j += i) {
				vis[j] = true;
				for (int s = 0; s < 1 << 11; ++s) {
					if ((s & g[i]) == 0) {
						ndp[s | g[i]] = Math.max(ndp[s | g[i]], dp[s] + j);
					}
				}
			}
			dp = ndp;
		}

		for (int i = 2; i <= N; ++i) {
			if (vis[i])
				continue;
			for (int s = 0; s < 1 << 11; ++s) {
				if ((s & g[i]) == 0)
					dp[s | g[i]] = Math.max(dp[s | g[i]], dp[s] + i);
			}
		}
		long ans = 0;
		for (long v : dp)
			ans = Math.max(ans, v);
		System.out.println(ans);
	}

	long gcd(long a, long b) {
		if (a > b)
			return gcd(b, a);
		if (a == 0)
			return b;
		return gcd(a, b % a);
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}