Perfect Number{सम्पूर्ण संख्या}
A number is called a perfect number whose sum of all its factors is twice the number itself.
Example :- 6 vkSj 28 are two whole numbers
The factors of 6 are 1 , 2 , 3 , 6 .
1 + 2 + 3 + 6 = 12
The factors of 28 are 1 , 2 , 4 , 7 , 14 , 28 .
1 + 2 + 4 + 7 + 14 + 28 = 56
