Let $n$ and $d$ be positive integers. We build the the divisor tree $T_{n,d}$ as follows:
- The root of the tree is a node marked with number
$n$. This is the$0$-th layer of the tree. - For each
$i$from$0$to$d - 1$, for each vertex of the$i$-th layer, do the following. If the current vertex is marked with$x$, create its children and mark them with all possible distinct divisors$^\dagger$of$x$. These children will be in the$(i+1)$-st layer. - The vertices on the
$d$-th layer are the leaves of the tree.
For example, $T_{6,2}$ (the divisor tree for $n = 6$ and $d = 2$) looks like this:

Define $f(n,d)$ as the number of leaves in $T_{n,d}$.
Given integers $n$, $k$, and $d$, please compute $\sum\limits_{i=1}^{n} f(i^k,d)$, modulo $10^9+7$.
$^\dagger$ In this problem, we say that an integer $y$ is a divisor of $x$ if $y \ge 1$ and there exists an integer $z$ such that $x = y \cdot z$.
Input
Each test contains multiple test cases. The first line contains the number of test cases $t$ ($1 \le t \le 10^4$). The description of the test cases follows.
The only line of each test case contains three integers $n$, $k$, and $d$ ($1 \le n \le 10^9$, $1 \le k,d \le 10^5$).
It is guaranteed that the sum of $n$ over all test cases does not exceed $10^9$.
Output
For each test case, output $\sum\limits_{i=1}^{n} f(i^k,d)$, modulo $10^9+7$.
Note
In the first test case, $n = 6$, $k = 1$, and $d = 1$. Thus, we need to find the total number of leaves in the divisor trees $T_{1,1}$, $T_{2,1}$, $T_{3,1}$, $T_{4,1}$, $T_{5,1}$, $T_{6,1}$.
$T_{1,1}$has only one leaf, which is marked with$1$.$T_{2,1}$has two leaves, marked with$1$and$2$.$T_{3,1}$has two leaves, marked with$1$and$3$.$T_{4,1}$has three leaves, marked with$1$,$2$, and$4$.$T_{5,1}$has two leaves, marked with$1$and$5$.$T_{6,1}$has four leaves, marked with$1$,$2$,$3$, and$6$.
The total number of leaves is $1 + 2 + 2 + 3 + 2 + 4 = 14$.
In the second test case, $n = 1$, $k = 3$, $d = 3$. Thus, we need to find the number of leaves in $T_{1,3}$, because $1^3 = 1$. This tree has only one leaf, so the answer is $1$.
样例
3
6 1 1
1 3 3
10 1 2
14
1
53
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