PERFECT NUMBERS If the sum of all the factors of a number is two times the number then the number is called a perfect number.

The sum of all the prime factors of a number is 15, then the number is ?

A number for which the sum of all its factors is equal to twice the number is called a _____ number.

In a set of three consecutive natural numbers, the sum of the last two numbers is equal to three times the first number. Find the sum of all the three numbers.

The number which is not a perfect square is-

Which of the following numbers is a perfect cube?

Which of the following numbers is a perfect cube?

Which of the following numbers is a perfect cube?

Which of the following numbers is a perfect cube?