www.answers.com/Q/What_are_the_proper_factors_of_28

The factors of 28 are 1,2,4,7,14, and 28. Add your proper factors -or the factors except itself- and determine if the sum of the proper factors is below (deficient), above (abundant), or the exact ...

www.answers.com/Q/What_are_the_factors_and_prime_factors_of_28

The proper factors of 28 are 1, 2, 4, 7, and 14 or, if the definition you are using excludes 1, they are 2, 4, 7, and 14. The prime factors of 28 is 2 and 7.

www.mathwarehouse.com/answered-questions/factors/what-are-the-factors-of-28...

The factors of 28 Answer: 1,2,4,7,14,28, Related Links : Is 28 a rational number? Is 28 an irrational number? Is 28 a prime number? Is 28 a composite number? Is 28 a perfect square? What is the prime factorization of 28? Factorization Calculator. Ultimate Math Solver (Free)

en.wikipedia.org/wiki/Perfect_number

The sum of proper divisors gives various other kinds of numbers. Numbers where the sum is less than the number itself are called deficient, and where it is greater than the number, abundant.These terms, together with perfect itself, come from Greek numerology.A pair of numbers which are the sum of each other's proper divisors are called amicable, and larger cycles of numbers are called sociabl...

www.mathsisfun.com/definitions/proper-factor.html

Illustrated definition of Proper Factor: Any of the factors of a number, except 1 or the number itself. All positive factors of 12: 1,2,3,4,6,12 Proper...

www.integers.co/questions-answers/what-is-the-sum-of-all-factors-of-the-number...

What is the sum of all factors of the number 28 including 28? Find out the answer and a whole lot more! Toggle navigation. Q: What is the sum of all factors of the number 28 including 28? A: 56. Why is 56 the sum of all factors of 28, including 28? The factors of the number 28 are: 1, 2, 4, 7, 14, 28.

mathforum.org/library/drmath/view/71550.html

So the process for finding the sum of all the factors of the number consists of the following steps: (1) find the prime factorization (2) form a product in which each term is the sum of all the powers of one of the prime factors up to the exponent on that prime factor in the prime factorization That product is the sum of the factors of the number.

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www.reference.com/world-view/factors-28-f9fabedbd9ceecea

The factors of 28 are 1, 2, 4, 7, 14 and 28. To get the factors, the number 28 must be divided by whole numbers starting from 1, and the quotient must also be a whole number. If this is the case, the quotient and the divisor are considered factors for the number in question.

www.calculatorsoup.com/calculators/math/factors.php

The Factoring Calculator finds the factors and factor pairs of a positive or negative number. Enter an integer number to find its factors. For positive integers the calculator will only present the positive factors because that is the normally accepted answer. For example, you get 2 and 3 as a factor pair of 6.