题目描述
Senior Pan has two positive integers
xand
y, and she calls an array is a beautiful array if and only if it satisfies the following conditions:
The elements in the array are integers.
The length of the array is exactly
y.
The product of each element is exactly
x.
Senior Pan wants you to help her calculate the number of beautiful arrays for different
xand
y.Two arrays
Aand
Bare considered different if there exists a position
ithat
A
i
≠ B
i.
The answer can be very large, so you can just tell her the number mod
10
9
+7.
For example, if
xis
2and
yis
2, there are four beautiful arrays:
[1, 2], [2, 1] ,[−1, −2], [−2, −1].
输入
The first line is an integer
T, denoting the number of test cases.
For the following
Tlines, each line contains two positive integers
xand
y.
1 ≤ T ≤ 10
5, x, y ≤ 2 ∗ 10
6
输出
OutputTlines, each line contains an integer, representing the number of beautiful array mod109+7.