package main

import . "fmt"

func main() {
	var n int
	Scan(&n)
	ans := solve(n)
	Println(len(ans))
	for _, s := range ans {
		Println(s)
	}
}

func solve(n int) (ans []string) {
	l, r := 1, 1
	sum := r*r*r
	for sum < n {
		r++
		sum += r*r*r
	}
	if sum == n {
		ans = append(ans, Sprint(l, r))
	}
	for l*l*l <= n {
		sum -= l*l*l
		l++
		for sum < n {
			r++
			sum += r*r*r
		}
		if sum == n {
			ans = append(ans, Sprint(l, r))
		}
	}
	return
}