import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

import numpy as np

P,Q = map(int, readline().split())
m = map(int,read().split())
LR = zip(m,m)

M = 30000
low_max = P//(M+1)
if low_max < 0:
    low_max = 0

lower = np.cumsum(P % np.arange(low_max + 1, dtype=np.int64))

left = P // np.arange(1, M+2, dtype=np.int64)
right = P // np.arange(0, M+1, dtype=np.int64)
S = (right - left) * (right + left + 1) // 2

upper = P * (right - left) - np.arange(M+1, dtype=np.int64) * S
upper[0] = 0
upper = upper[::-1].cumsum()[::-1]

lower = lower.tolist()
upper = upper.tolist()
upper.append(0)

def F(N):
    if N <= low_max:
        return lower[N]
    if N > P:
        return upper[0] + lower[-1] + (N - P) * P
    n = P // N
    x = lower[-1] + upper[n+1]  # 商 n+1 以上
    L = P // (n+1)
    return x + P * (N - L) - (N - L) * (N + L + 1) // 2 * n

for L,R in LR:
    print(F(R) - F(L-1))