using System;
using System.Collections.Generic;
using System.Linq;

public class E3 {
	public static List<long> factor(long n) {
		for (long i = 2; i < Math.Sqrt(n); i++) {
			if (n % i == 0) {
				return factor(n/i).Concat(factor(i)).ToList();
			}
		}
		return new List<long> {n};
	}

	public static void Main() {
		
		System.Console.WriteLine(factor(600851475143).Max());
	}
}