#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}


struct FastIO{
  FastIO(){
    cin.tie(0);
    ios::sync_with_stdio(0);
  }
}fastio_beet;

//INSERT ABOVE HERE
signed main(){
  Int p,q;
  cin>>p>>q;
  
  const Int MAX = 2e7;
  vector<Int> dp(MAX,0);
  for(Int i=1;i<MAX;i++) dp[i]=dp[i-1]+(p%i);

  map<Int, Int> dp2;
  dp2[MAX-1]=dp[MAX-1];
  auto calc=
    [&](Int x)->Int{
      if(x<MAX) return dp[x];
      if(dp2.count(x)) return dp2[x];
      
      Int &res=dp2[x];
      Int k=(--dp2.upper_bound(x))->second+1;      
      res=dp2[k-1]+(x-k+1)*p;
      
      auto sub=
        [&](Int a,Int b){
          assert(p/a==p/b);
          res-=(p/a)*(a+b)*(b-a+1)/2;          
        };
      
      while(k<x){
        if(p/k==p/x){
          sub(k,x);
          break;
        }
        Int l=k,r=x;
        while(l+1<r){
          Int m=(l+r)>>1;
          if(p/k==p/m) l=m;
          else r=m;
        }
        sub(k,l);
        k=r;
      }
      return res;
    };
  
  for(Int i=0;i<q;i++){
    Int l,r;
    cin>>l>>r;
    cout<<calc(r)-calc(l-1)<<"\n";
  }
  cout<<flush;
  return 0;
}