Prime Factorisation and Euler Totient Function - Video Lecture

Dear friends in this video lecture I have told about the concept of prime factorisation of natural numbers. This concept of Prime Factorisation is useful from the perspective of many types of questions. For example finding out the number of factors of a number, finding out the co-primes less than a number and in turn finding out the sum of all those coprimes.

The concept of Euler Totient function is closely associated with that of Prime Factorisation of number