from itertools import product
N, K = map(int, input().split())
MOD = 10**9 + 7

fact = [1]*(N+1)
rfact = [1]*(N+1)
r = 1
for i in range(1, N+1):
  fact[i] = r = r * i % MOD
rfact[N] = r = pow(fact[N], MOD-2, MOD)
for i in range(N, 0, -1):
  rfact[i-1] = r = r * i % MOD
def comb(n, k):
  return fact[n] * rfact[k] * rfact[n-k] % MOD

p = [1]*(N+1)
p[0] = p[1] = 0

vs = []
ans = 0
for x in range(2, N+1):
    if p[x] and N % x == 0 and K % x == 0:
        for y in range(x*x, N+1, x):
            p[y] = 0
        vs.append(x)

L = len(vs)
for ps in product([0, 1], repeat=L):
    e = 1
    c = 0
    for p, v in zip(ps, vs):
        if p:
            c ^= 1
            e *= v
    if e == 1:
        continue
    ans += comb(N//e, K//e) if c else -comb(N//e, K//e)
print(ans % MOD)