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

#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define FORR2(x,y,arr) for(auto& [x,y]:arr)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
template<class T> bool chmax(T &a, const T &b) { if(a<b){a=b;return 1;}return 0;}
template<class T> bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;}
//-------------------------------------------------------

int Q;
int L[202020],R[202020];;
int P[1<<20];
int ret[202020];
vector<int> ev[1<<20],qs[1<<20];

template<class V, int ME> class BIT {
public:
	V bit[1<<ME];
	V operator()(int e) {if(e<0) return 0;V s=0;e++;while(e) s+=bit[e-1],e-=e&-e; return s;}
	void add(int e,V v) { e++; while(e<=1<<ME) bit[e-1]+=v,e+=e&-e;}
};
BIT<int,20> bt;

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	for(i=1;i<=1000000;i++) {
		for(j=i*2;j<=1000000;j+=i) P[j]=i;
		ev[P[i]].push_back(i);
	}
	cin>>Q;
	FOR(i,Q) {
		cin>>L[i]>>R[i];
		qs[L[i]].push_back(i);
	}
	
	for(i=0;i<1010101;i++) {
		FORR(e,qs[i]) ret[e]=bt(R[e])-bt(L[e]-1);
		FORR(v,ev[i]) bt.add(v,1);
	}
	FOR(i,Q) cout<<ret[i]<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}