Q.)What is the sum of all the even factors of 2160?

(i)10800

(ii)3600

(iii)7200

(iv)14400

=>

2160 =

Sum of all the even factors =

=

=6*30*40 =7200.

As the sum is to be found out only for even factors, so 2 always has to be included. So the sum started with .

Option(iii)