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你有 $q$ 組詢問，每組詢問你需要計算出組合數 $\binom{n}{m}$ 的因子數量。
由於答案可能很大，你只需要輸出將答案對 $p = 10^9 + 7$ 取模的結果即可。
第一行一個正整數 $q$ 表示詢問數量。
接下來 $q$ 行，每行兩個整數 $n, m$，保證 $0\le m \le n$。
輸出 $q$ 行，每行一個整數對應該詢問的答案。
對於 $10\%$ 的資料，保證 $q \le 10^{3}, n \le 10^{3}$。
對於 $50\%$ 的資料，保證 $q \le 10^{5}, n \le 10^{5}$。
對於 $100\%$ 的資料，保證 $q \le 5\times 10^{5}, n \le 10^{6}$。
4
0 0
1 0
2 1
3 21
1
2
25
3 2
5 3
5 4
6 2
8 32
4
2
4
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