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A perfect number is the sum of its divisors; for example 6 is a perfect number because the sum of its divisors is 6 (1 + 2 + 3). The sum of the divisors of 8 is 7 (1 + 2 + 4), so 8 is not a perfect number.

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โˆ™ 2010-10-24 01:10:03
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Q: Is 8 a perfect number
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Related questions

Why 8 is not a perfect square?

The number 8 is not a perfect square because it is not classified as the product of two positive integers. The number 8 is classified as a perfect cube, however.


Which of these numbers is a perfect number 4 6 1 0 2 2 2 8?

6 is the only perfect digit. The next perfect number is 28.


What number is a multiple of 4 and is not a square number?

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What do you do if the root of a number is not perfect like 8?

Your head asplodes.


Whats a perfect square?

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By what least number must 217800 be multiplied in order to make it a perfect square?

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What are the perfect number less than 100?

300+20+8 is 10 less than what number


What are near perfect numbers?

They are numbers that are NEAR PERFECT. a near perfect number is when its factors (exept the actual number) are added up and ALMOST equal the number ex. 16x1/2x8/4x4/ so its factors are 1,2,4,8 and 16 so add them ( exept the actual number) 1+2+4+8=15 so its NEAR PERFECT and a perfect number is a number that all its factors equal to its number ex. 6-1,2,3,6 are its factors all together-1+2+3=6 those are NEAR PERFECT and PERFECT numbers


What is 140 divisible by 8 in a whole number?

The division 140/8 will not give a perfect whole number answer. The answer when 140 is divided by 8 equals 17.5 In order to make this a whole number it must be rounded up to 18.


What is the smallest counting numbergreater than 1 that is both a perfect cube and a perfect square?

How about 64 which is cube and square number because 4*4*4 = 64 and 8*8 = 64


What is the smallest number greater than 1 that is both a perfect square and perfect cube?

64 (8*8) and (4*4*4)The next one is 81 (9*9) and (3*3*3) :)


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To find perfect number in c language?

Perfect number is a number whose factors other than itself add up to itself. For example 6 is perfect number because 1+2+3=6 where 1, 2 and 3 are its factors. But 8 is not perfect because 1+2+4 = 7. Other examples of perfect numbers are 28, 496 and 8128 etc.


Is 8 a factor of 80?

Yes, 8 is a factor of 80 because if you times 8 with anither number, in this case, 10, you'd get 80, which is a perfect fit.


What are 2 almost perfect numbers between 5 and 20?

Perfect numbers are numbers where all the factors add to that number. For example 6's factors are 1,2, and 3 and 1+2+3=6. Therefore the next perfect number isn't until 28 which is 1,2, 4, 7, 14 where 1+2+4+7+14= 28 An almost perfect number is a number which, when adding all of its proper divisors (all divisors except himself), gives you one less, or one more then the number itlself. Up to now all known almost perfect numbers are 2^n. So to answer your question, the 2 almost perfect numbers between 5 and 20 are 8 and 16. Divisors of 8: 1,2,4 -----> 1+2+4=7 Divisors of 16: 1,2,4,8 -----> 1+2+4+8=15


Why is the product of 8 multiply 8 called a square number?

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What is the sum of the first perfect number and the second perfect number?

The sum of the 1st perfect number and 2nd perfect number is. . . 34!


What is the least whole number with exactly seven positive divisors?

64: 1, 2, 4, 8, 16, 32, 64Tip: To find the number, consider that if there are an odd number of factors, the number must be a perfect square, because a perfect square has one factor that is multiplied by itself. 64: 1, 2, 4, 8, 16, 32, 64Tip: To find the number, consider that if there are an odd number of factors, the number must be a perfect square, because a perfect square has one factor that is multiplied by itself.


What is the third perfect number?

496 is the third perfect number and 8128 is the fourth perfect number.


What is the difference between square roots and a perfect square?

The square root of a perfect square is a whole number. Example sqrt(36) = 6 so 36 is a perfect square Example sqrt(25) = 5 so 25 is a perfect square Example sqrt(8)= 2.828 which is not whole so 8 is not a perfect square


Is 70 a square number?

No, at least, 70 isn't a perfect square. The nearest perfect squares are 8 squared = 64, and 9 squared = 81.


How do you get perfect squares?

multiply the same number by itself, for example: 2*2=4, 4 is a perfect square. 8*8=64, 64 is a perfect square. the first few perfect squares are 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225,....


Why is 64 a perfect square?

Yes, 64 is a perfect squarebecause 64 = 8*8