The sum of all positive divisors of $242$ except $1$ and itself is:

The number of positive odd divisors of $216$ is

The largest natural number $n$ such that $3^{n}$ divides $66!$ is $............$.

The greatest value of $x$ satisfying $21 \equiv 385 \pmod{x}$ and $587 \equiv 167 \pmod{x}$ is

Among the positive divisors of the number $12600$,if $n_1$ is the number of divisors which are multiples of $3$ and $n_2$ is the number of divisors which are multiples of $14$,then $n_1 + n_2 =$

The coefficient of $x^7$ in $(1-x+2x^3)^{10}$ is $........$.