from bisect import bisect_right

def f(r):
    i = bisect_right(R,r)-1
    res = r*p - acc[i]
    r = min(r,p)
    res -= (r+R[i]+1)*(r-R[i])//2*V[i]
    return res

p,Q = map(int,input().split())
M = int(p**0.5)
V = [p//i for i in range(1,M)] + list(range(1,p//M+1)[::-1])
R = [0]+[p//i for i in V]
V += [0]
acc = [0]*(len(V)+1)
for i in range(1,len(V)):
    acc[i] = acc[i-1] + (R[i]+R[i-1]+1)*(R[i]-R[i-1])//2*V[i-1]
for _ in range(Q):
    l,r = map(int,input().split())
    print(f(r)-f(l-1))