CF1068B.LCM

Ivan has number $b$. He is sorting through the numbers $a$ from $1$ to $10^{18}$, and for every $a$ writes $\frac{[a, \,\, b]}{a}$ on blackboard. Here $[a, \,\, b]$ stands for least common multiple of $a$ and $b$. Ivan is very lazy, that's why this task bored him soon. But he is interested in how many different numbers he would write on the board if he would finish the task. Help him to find the quantity of different numbers he would write on the board.

伊万有一个数 $b$。他正在遍历从 $1$ 到 $10^{18}$ 的所有整数 $a$，并对每个 $a$ 在黑板上写下 $\frac{[a, \,\, b]}{a}$。其中 $[a, \,\, b]$ 表示 $a$ 与 $b$ 的最小公倍数。伊万非常懒，因此这项任务很快让他感到厌烦。但他很想知道：如果他完成整个任务，黑板上一共会写出多少个不同的数？请帮助他求出这个不同数值的个数。

The only line contains one integer — $b$ $(1 \le b \le 10^{10})$.

唯一的一行包含一个整数 — $b$ $(1 \le b \le 10^{10})$。

Print one number — answer for the problem.

输出一个数字——该问题的答案。

In the first example $[a, \,\, 1] = a$, therefore $\frac{[a, \,\, b]}{a}$ is always equal to $1$.

In the second example $[a, \,\, 2]$ can be equal to $a$ or $2 \cdot a$ depending on parity of $a$. $\frac{[a, \,\, b]}{a}$ can be equal to $1$ and $2$.

在第一个例子中，$[a, \,\, 1] = a$，因此 $\frac{[a, \,\, b]}{a}$ 恒等于 $1$。

在第二个例子中，$[a, \,\, 2]$ 的值取决于 $a$ 的奇偶性，可能为 $a$ 或 $2 \cdot a$。$\frac{[a, \,\, b]}{a}$ 的值可能为 $1$ 或 $2$。