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

class Program
{
    static long NN => long.Parse(ReadLine());
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var cum = new long[1_000_002];
        for (var i = 1L; i < cum.Length; ++i) cum[i] = cum[i - 1] + i * i * i;
        var ans = new List<int[]>();
        var j = 0;
        for (var i = 0; i < cum.Length; ++i)
        {
            while (j < i && cum[i] - cum[j] > n) ++j;
            if (cum[i] - cum[j] == n) ans.Add(new int[] { j + 1, i });
        }
        WriteLine(ans.Count);
        if (ans.Count > 0) WriteLine(string.Join("\n", ans.Select(ai => string.Join(" ", ai))));
    }
}