#include <bits/stdc++.h>

using namespace std;

long long int p,q,l,r;
long long int a[1000001];
long long int psum[1000001];
int arr[1000001];

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    cin >> p >> q;

    arr[0] = p + 1;
    for(int i=1;i<=1000000;i++)
    {
        a[i] = p%i;
        psum[i] = psum[i-1] + a[i];
        arr[i] = p/(i+1) + 1;
    }

    while(q--)
    {
        cin >> l >> r;
        if(r<=1000000)
        {
            cout << psum[r] - psum[l-1] << '\n';
        }
        else
        {
            long long int res = 0;
            if(l<=1000000)
            {
                res += psum[1000000];
                res -= psum[l-1];
                l = 1000001;
            }
            long long int x = p/l;
            long long int y = p/r;
            while(x>y)
            {
                long long int v = arr[x-1]-1;
                long long int val = p*(v-l+1);
                val -= (x*(v+l)*(v-l+1)/2);
                res += val;
                x--;
                l = arr[x];
            }
            res += (p*(r-l+1));
            res -= (y*(r+l)*(r-l+1)/2);
            cout << res << '\n';
        }
    }
    return 0;
}