#!/usr/bin/ python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
from functools import lru_cache

H, W = map(int, readline().split())
if H < W:
    H, W = W, H


def S1(n):
    return n * (n + 1) // 2


def S2(n):
    return n * (n + 1) * (2 * n + 1) // 6


@lru_cache(None)
def f(H, W):
    """ 1 <= x <= H, 1 <= y <= W, gcd(x,y) = 1 に対して、sum 1, sum x, sum y, sum xyをかえす"""
    SH = H * (H + 1) // 2
    SW = W * (W + 1) // 2
    sum_1 = H * W
    sum_x = SH * W
    sum_y = SW * H
    sum_xy = SH * SW
    d = 2
    while True:
        Hd = H // d
        Wd = W // d
        if not Wd:
            break
        next_d = min(H // Hd, W // Wd) + 1
        s1, sx, sy, sxy = f(Hd, Wd)
        sum_1 -= s1 * (next_d - d)
        sum_x -= sx * (S1(next_d - 1) - S1(d - 1))
        sum_y -= sy * (S1(next_d - 1) - S1(d - 1))
        sum_xy -= sxy * (S2(next_d - 1) - S2(d - 1))
        d = next_d
    return sum_1, sum_x, sum_y, sum_xy


sum_1, sum_x, sum_y, sum_xy = f(H, W)
answer = sum_1 * H * W - W * sum_x - H * sum_y + sum_xy
answer *= 2
# まよこ、まうえ
answer += (W - 1) * H
answer += (H - 1) * W

MOD = 10 ** 9 + 7
print(answer % MOD)