How to find the sum of reciprocals of the factors of a number | Sum of reciprocals

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In this video, you will learn how to find the sum of reciprocal of the factors of a number .

This is an important topic for all and sufficient for any competitive exam or any maths Olympiad or for any entrance exam.

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Topics discussed in this video:

1. What are the factors of a number.
2. how to find the sum factors of a number.
3, how to prime factorise a number.
4. Method for finding the sum of reciprocal of the factors of a number
5. 3 questions on finding the sum of reciprocal of the factors of a number

Questions discussed in the video:

1. Find the sum of reciprocals of all the factors of 100 .

2. Find the sum of reciprocals of all the factors of 2^3 x 3^2 x 7

3.Find the sum of reciprocals of all the factors of 6!

Practice Questions discussed in this video :

1. Find the sum of reciprocals of all the factors of

A. 8!

B. 2450

C. 15^4

Important lectures on the topics of factors :

1. How to prime factorise a number

2. How to find the number of factors of a number

3. How to find the sum of of factors of a number

4. How to find the product of factors of a number

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