import std;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] lreads(T = long)(long n){return generate(()=>readln.chomp.to!T()).take(n).array();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
alias PQueue(T, alias less = "a<b") = BinaryHeap!(Array!T, less);
// dfmt on

void main()
{
    long N, K;
    scan(N, K);
    auto C = new long[](K + 1);
    long ans;
    foreach_reverse (x; 1 .. K + 1)
    {
        C[x] = powmod(K / x, N, MOD);
        long i = 2;
        while (x * i <= K)
        {
            C[x] = (MOD - C[x * i] + C[x]) % MOD;
            i++;
        }
        ans = (ans + C[x] * x) % MOD;
    }
    writeln(ans);
}

/// x^^n % m
T powmod(T = long)(T x, T n, T m = 10 ^^ 9 + 7)
{
    if (n < 1)
        return 1;
    if (n & 1)
    {
        return x * powmod(x, n - 1, m) % m;
    }
    T tmp = powmod(x, n / 2, m);
    return tmp * tmp % m;
}
