using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var ans = 0L;
        var mod = 998_244_353;
        for (var i = 1; i <= n; ++i)
        {
            var sq = (int)Math.Sqrt(i);
            var sub = 0;
            for (var j = 1; j <= i; ++j)
            {
                if (i / j <= sq) break;
                ans = (ans + i / j) % mod;
                ++sub;
            }
            for (var k = sq; k > 0; --k)
            {
                ans = (ans + (i / k - sub) * k) % mod;
                sub = i / k;
            }
        }
        WriteLine(ans);
    }
}