Express each of the following as a product of prime numbers.

$1680$

$1232$.

$2310$

Express each of the following as a product of prime numbers.

$1764$

Express each of the following as a product of prime numbers.

$23595$

Express each of the following as a product of prime numbers.

$24640$

Find the HCF of the follwoing by prime factorisation.

$40$and $96.$

Find the HCF of the following by prime factorisation.

$81$  and $27$.