def Mebius(N):
    mebius=[1]*(N+1)
    mebius[0]=0
    is_prime=[True]*(N+1)
    is_prime[0]=False
    is_prime[1]=False
    for p in range(2,N+1):
        if is_prime[p]:
            for pp in range(p,N+1,p):
                mebius[pp]*=-1
                is_prime[pp]=False
            for pp in range(p**2,N+1,p**2):
                mebius[pp]=0
    return mebius

N,M=map(int,input().split())
ans=0
if N>=M:
    Me=Mebius(N)
    mod=10**9+7
    for i in range(1,N+1):
        if i%M:
            continue
        ans+=Me[i//M]*(N//i)*(N//i-1)
        ans%=mod
    for i in range(1,N-1):
        ans*=i
        ans%=mod
print(ans)