use std::collections::VecDeque;


fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut k = String::new();
    std::io::stdin().read_line(&mut k).ok();
    let k: usize = k.trim().parse().unwrap();

    if k < 4 {
        println!("0");
        return;
    }
    let mut result = 0usize;
    for i in 2..=(k as f64).sqrt() as usize {
        if k % i > 0 { continue; }
        let ac = i;
        let ac = if ac / 2 + ac % 2 > n { 0 } else if ac <= n { ac - 1 } else { 1 + n - (ac - n) };
        let bd = k / i;
        let bd = if bd / 2 + bd % 2 > n { 0 } else if bd <= n { bd - 1 } else { 1 + n - (bd - n) };
        result += ac * bd;
    }
    println!("{}", result * 2);
}