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Subjects>Math>Other Math

Is 28 a perfect abundant or deficient number?

Anonymous

∙ 13y ago

Updated: 4/28/2022

it is perfect i believe the factors are 1,2,4,7,and 14

Wiki User

∙ 13y ago

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Q: Is 28 a perfect abundant or deficient number?

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Is 8 an abundant number or a deficient number?

It is a deficient number. The first abundant number is 12. 12: 1,2,3,4,6,12 which equal 28 28>(12*2) and the abundance is 28-(12*2)=4

How is 28 the perfect number?

First of all, to know if a number is abundant, deficient, or perfect, you need to know all the factors of your given number. 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 same amount (perfect). In this case, if you add the proper factors, it equals exactly 28. Because it is exact, it is perfect! =)

Why is 28 a perfect number?

A number is perfect if all it's factors (barring itself) sum to make the original number. In this case, the factors of 28 are 1,2,4,7 and 14. Added up, these equal 28. Thus, 28 is a perfect number.

What am I if I am a two digit number between 10 and 40 and the sum of all my divisors?

15

How many perfect numbers are in between 20 and 50?

The only perfect number between 20 and 50 is 28.

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Related Questions

How is 28 the perfect number?

First of all, to know if a number is abundant, deficient, or perfect, you need to know all the factors of your given number. 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 same amount (perfect). In this case, if you add the proper factors, it equals exactly 28. Because it is exact, it is perfect! =)

Is 8 an abundant number or a deficient number?

It is a deficient number. The first abundant number is 12. 12: 1,2,3,4,6,12 which equal 28 28>(12*2) and the abundance is 28-(12*2)=4

Is 214 abundant deficient or perfect?

A perfect number is a number which is the sum of it's positive proper divisors. 214 has divisors: 1, 2, 107 1 + 2 + 107 = 110 != 214 Thus 214 is not a perfect number The first 4 perfect numbers are: 6, 28, 496 and 8128.

Is the number 14 a abundant perfect or deficient number?

14 is deficient. It is less than the sum of it's divisors. In mathematics, a deficient number or defective number is a number n for which σ(n) < 2n. Here σ(n) is the sum-of-divisors function: the sum of all positive divisors of n, including n itself Proof.. divisors of 14 are 1,2, and 7 and 14. Now, 2n=28 and and the sum the all the divisors including 14 is 24<28

What are the Math terms abundant perfect and deficient?

They refer to the sum of a number's proper divisors, defined here as all of the factors except the number itself.a perfect number equals the sum of its proper divisorsa deficient number is greater than the sum of its proper divisorsan abundant number is less than the sum of its proper divisors

Is 28 abundant deficient perferct or near perfect?

An integer is a perfect number if it is equal to the sum of its positive divisors, not including the number itself.The divisors of 28 are : 1, 2, 4, 7 and 14....and these sum to 28. Thus 28 is a perfect number.In Number Theory there is a theorem that, If 2k - 1 is prime then 2k-1(2k - 1) is perfect.If we put k = 3 then 2k - 1 = 23 - 1 = 8 - 1 = 7 is prime.And, 23-1 (23 - 1) = 22(8 - 1) = 4 x 7 = 28....is the resultant perfect number.

Is 20 a perfect number?

No it is not. The closest perfect number to it is 28. The divisors of 20 are 1,2,4,5,10 those add up to more than 20 so 20 is an abundant number.

Is 28 a perfect number?

Yes it is. 6 is the first perfect number, 28 is the second perfect number.

What is the Perfect number and what is the perfect number after 28?

A perfect number is a number that is the sum of all its proper factors (that is all its factors excluding itself). The next perfect number after 28 is 496

Why is 28 a perfect number?

A number is perfect if all it's factors (barring itself) sum to make the original number. In this case, the factors of 28 are 1,2,4,7 and 14. Added up, these equal 28. Thus, 28 is a perfect number.

Is there a perfect number between 20 and 30?

28 is a perfect number.

When after 11 is there a perfect number?

The next perfect number after 11 is 28.

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