fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: u64 = n.trim().parse().unwrap();

    let mut answer = 1;
    for p in 2.. {
        if p * p > n {
            break;
        }
        let mut sum = 1;
        let mut p_tmp = p;
        while n % p == 0 {
            n /= p;
            sum += p_tmp;
            p_tmp *= p;
        }
        answer *= sum;
    }

    if n > 1 {
        answer *= n + 1;
    }

    println!("{answer}");
}