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A10676. Bash Plays with Functions

编程题 普及/提高-

题目描述

Bash got tired on his journey to become the greatest Pokemon master. So he decides to take a break and play with functions.

Bash defines a function $f_{0}(n)$ , which denotes the number of ways of factoring $n$ into two factors $p$ and $q$ such that $gcd(p,q)=1$ . In other words, $f_{0}(n)$ is the number of ordered pairs of positive integers $(p,q)$ such that $p·q=n$ and $gcd(p,q)=1$ .

But Bash felt that it was too easy to calculate this function. So he defined a series of functions, where $f_{r+1}$ is defined as:

![](/uploads/acgo/image/cc79c427951a7421_8d855721f380.jpeg)Where $(u,v)$ is any ordered pair of positive integers, they need not to be co-prime.

Now Bash wants to know the value of $f_{r}(n)$ for different $r$ and $n$ . Since the value could be huge, he would like to know the value modulo $10^{9}+7$ . Help him!

输入格式

The first line contains an integer $q$ ( $1<=q<=10^{6}$ ) — the number of values Bash wants to know.

Each of the next $q$ lines contain two integers $r$ and $n$ ( $0<=r<=10^{6}$ , $1<=n<=10^{6}$ ), which denote Bash wants to know the value $f_{r}(n)$ .

输出格式

Print $q$ integers. For each pair of $r$ and $n$ given, print $f_{r}(n)$ modulo $10^{9}+7$ on a separate line.

输入输出样例

输入 #1
5
0 30
1 25
3 65
2 5
4 48
输出 #1
8
5
25
4
630
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