#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const ll mod=998244353;
void add(ll &a,ll b){
//	b%=mod;
	a+=b;
	if (a>=mod) a-=mod;	
}

ll CNT=0;
ll X;

ll gao(ll lim){
	ll ans=0;
	for (ll b=1;b*(b+1)*(b+2)<=X;b++){
		ll ed=X/b/(b+1)/(b+2);
		ed=min(ed,b-1);
		for (ll a=1;a<=ed;a++){
			ll mx=X/a/b;
			
			ll lc=b+1;
			ll rc=sqrtl(mx);
			for (;(rc+1)*(rc+2)<=mx;) rc++;
			for (;rc*(rc+1)>mx;) rc--;
		//	cerr << "a,b,lc,rc : " << a << " " << b << " " << lc << " " << rc << endl;
			if (lc>rc) continue;
		//	cerr << "a,b,lc,rc : " << a << " " << b << " " << lc << " " << rc << endl;
			{
				//ab
				if (a+b<=lim) add(ans,rc-lc+1);
			}
			{
				//ac
				ll lt=lc;
				ll rt=rc;
				rt=min(rt,lim-a);
				if (lt<=rt) add(ans,rt-lt+1);
			}
			{
				//bc
				ll lt=lc;
				ll rt=rc;
				rt=min(rt,lim-b);
				if (lt<=rt) add(ans,rt-lt+1);
			}
			{
				//ad
				ll lo=lc,hi=rc;
				if (mx/hi+a<=lim){ 
					for (;lo<hi;){
						ll mid=(lo+hi)/2;
						if (mx/mid+a<=lim) hi=mid;
						else lo=mid+1;	
					}
					add(ans,rc-lo+1);
				}
			}
			{
				//bd
				ll lo=lc,hi=rc;
				if (mx/hi+b<=lim){ 
					for (;lo<hi;){
						ll mid=(lo+hi)/2;
						if (mx/mid+b<=lim) hi=mid;
						else lo=mid+1;	
					}
					add(ans,rc-lo+1);
				}
			}
			{
				//cd
				ll lo=lc,hi=rc;
				if (mx/hi+hi<=lim){ 
					for (;lo<hi;){
						ll mid=(lo+hi)/2;
						if (mx/mid+mid<=lim) hi=mid;
						else lo=mid+1;	
					}
					add(ans,rc-lo+1);
				}
			}
		}
	}
	return ans;
}

int main(){
	ll L,R;
	cin >> X >> L >> R;
	ll ans=(gao(R-1)-gao(L-1))*4;
	ans=(ans%mod+mod)%mod;
	cout << ans << "\n";
	return 0;	
}