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81 = 3x3x3x3 = 34

81 = 1,3,9,27,81

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โˆ™ 2009-11-03 22:23:41
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Q: What are all the whole number factors for 81?
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Related questions

What are the factors for number 81?

Factors are just numbers 81 can be divided by. The whole number factors are 1, 3, 9, 27, and 81


What are the whole number factors of 81?

1, 3, 9, 27, and 81.


What are all the factors of 81?

Factors are numbers you can multiply together to get another number. 81: 1, 3, 9, 27, 81


Is the number 81 a whole number?

Whole Number : Set of counting numbers along with zero. i.e. W = {0,1,2,3...} Therefore, 81 is a whole number.


What is 81 over 9 as a whole number?

81/9 = 9


Why 81 have an odd number of factors and 40 have an even number of factors?

A number will have an odd number of factors if and only if one of those factors is the square root of the number. This is because any factor of a number you can find must pair up with another factor of that number, and multiply to give the number. The only exception is when the factor would be paired with itself. In other words, be the square root. 81 is a square number, and so the factor 9 (square root of 81) will not pair with any other factor, meaning 81 will have an odd number of factors. 40 has an even number of factors, because it is not a square number, and so all its factors can pair up.


Which number has exactly 5 factors?

16 and 81 have 5 factors


Is 81 a composite or prime number?

81 is a composite number because it has more factors than 1 and itself. The factors of 81 are 1, 3, 9, 27, and 81.


What number has five factors up 1000?

16, 81, 256, 625 all have five factors.


What is the whole number of 81 over 90?

There is no whole number - 81/90 in its simplest form is 9/10 !


Do all square numbers have exactly 3 factors?

No. 81=9*9=3*27=1*81 81 has 5 factors and is a square number. 36=6*6=3*12=1*36=2*18=4*9 36 has 9 factors and is a square number. This doesn't mean that no square numbers have exactly 3 factors though, because: 9=3*3=1*9 9 has 3 factors and is a square number. 4=2*2=1*4 4 has 3 factors and is a square number. All square numbers have an odd number of factors though (because they have a whole number which multiplies by itself to get the number). Factors are whole numbers only, and not decimals. Hope this helps :)


Is 81 a prime number or a composite number?

81 is a composite number because it has factors other than 1 and itself. 81 is not a prime number. 81 = 3 * 3 * 3 * 3. Its positive integer factors are: 1, 3, 9, 27, 81.


Find all the factors of 81?

81 has these five factors: 1 3 9 27 81.


Is 81 a prime number?

81 is not a prime number. Its positive integer factors are: 1, 3, 9, 27, 81.81 is a Composite Number.


The number 81 27 and 45 are all multiples of 1?

Incorrect. Instead they are factors of I, 3 and 9.


Why is 81 a composite?

It has more than two distinct factors; they are 1, 3, 9, 27, 81


What are 2 whole numbers that 80 is in between?

79 & 81, or any whole number from 1 to 79 with any whole number greater than 81.


What are all the common factors of 81?

The factors of 81 are 1, 3, 9, 27, 81. For them to be common, they need to be compared to another set of factors.


What are all the factors for 81?

The positive integer factors of 81 are:1, 3, 9, 27, 81


81 prime or composite?

81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.


Find all factors of 81?

All Factors of 81:1, 3, 9, 27, 81


How is 81 an odd number?

An odd number is a whole number that can not be evenly divided by 2. 81 divided by 2 is 40.5 (which is not a whole number, because of the fraction of a number, .5) therefore, it is an odd number.


Does number 81 has 12 factors?

No, it does not.


Is 81 whole number?

Yes, it is.


Is 81 a composite number?

Yes. One of the reasons are that if you Google it, they say it's a composite #. Second, a prime number has 2 factors: 1 and itself. But 81 has 5 factors:1, 3, 9, 27, and 81.81 is a composite number 3 * 3 * 3 * 3 = 81