use proconio::input;

fn main() {
    input! {
        n: i64,
    }

    let i3 = (0..=1_000_000).map(|i| i * i * i).collect::<Vec<_>>();

    let mut res = vec![];
    let mut r = 1;
    let mut sum = 0;
    for l in 1..i3.len() {
        while sum < n {
            sum += i3[r];
            r += 1;
        }
        if sum == n {
            res.push((l, r - 1));
        }
        sum -= i3[l];
    }

    println!("{}", res.len());
    for (l, r) in res {
        println!("{} {}", l, r);
    }
}