#![allow(non_snake_case)]

use std::cmp;
use std::io::{ self, prelude::* };

macro_rules! pick {
    ($tokens:expr) => {
        $tokens.next().unwrap().parse().expect("parse error")
    }
}

fn main() {
    let mut s = String::new();
    io::stdin().read_to_string(&mut s).expect("i/o error");
    let mut tokens = s.split_whitespace();

    let N: i64 = pick!(tokens);
    let K: i64 = pick!(tokens);

    let mut ans = 1;
    for d in 2.. {
        if d*d > N { break };

        if N%d == 0 {
            if N/d >= K {
                ans = cmp::max(ans, d);
            }
            if d >= K {
                ans = cmp::max(ans, N/d);
            }
        }
    }

    println!("{}", ans);
}