Welcome to Ctanujit Institute of Statistics & Mathematics...An Initiative by 'ISI'ian

Urgent Notice:

Due to unavoidable reason, Ctanujit Classes will be closed from 1st November to 30th November 2018.
Postal Package will be available from 1st December 2018.

How to Find the Number of Factors in a Number


This can be explained much better through an example.

Ex. How many factors are there in 1200 ?
Sol:- The proper factors of 1200 are 2,3,5.
1200= {2^4}{3^1}{5²}
That is, 2^p .3^q .5^r is a factor of 1200 where the values of p=0,1,2,3,4 ; q=0,1 ; r=0,1,2.
So, Total number of factors=5*2*3=30.
Since 2^0 =3^0 * 5^0 is also included among these factors.

Hence the required number of factors=30-1=29.