#include <bits/stdc++.h>

#define input "sumdiv.in"
#define output "sumdiv.out"
#define NMAX 100005
#define MOD 666013

using namespace std;
typedef long long ll;

ifstream in(input);
ofstream out(output);

ll B, E;
vector < ll > primes;
bool uz[NMAX];

ll fasto_expo(ll base, ll exp)
{
    if(!exp) return 1;
    if(exp == 1) return base;
    if(exp % 2 == 1) return base * fasto_expo(base * base, exp / 2);
    return fasto_expo(base * base, exp / 2);
}

void Erastostene()
{
    primes.push_back(2);
    for(int i = 3; i <= NMAX - 5; i += 2)
        if(!uz[i])
        {
            primes.push_back(i);
            for(int j = 3 * i; j <= NMAX - 5; j+= 2 * i)
                uz[i] = 1;
        }
}



void Read_Data()
{
    in >> B >> E;
    Erastostene();
}

void Solve()
{

}

void

int main()
{
    Read_Data();
    return 0;
}