another problem related to prime numbers and C programming

Question

how we can break a number into multiplication of prime numbers which are less than the first number?(I meant something like:
input=24
output=2*2*2*3)

Answer 1

You mean, prime factorization!
https://www.sololearn.com/learn/4714/?ref=app
https://code.sololearn.com/c49JjOhio03b/?ref=app

Answer 2

https://code.sololearn.com/cvSt1LRxjqJc/?ref=app