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The factors of 21 are: 1, 3, 7, 21.

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โˆ™ 2014-06-18 14:13:09
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Q: What are the proper factors of the number 21?
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Related questions

What are the proper factors of the number 126?

The proper factors of a number are all the factors less than itself, so the proper factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, and 63. In some cases, the number 1 is excluded from the list of proper factors, too.


Is 294 a proper factor of 147?

No, 294 is not a proper factor of 147. Proper factors are smaller than the number of which they are a factor. The proper factors of 147 are 3, 7, 21, 49, and perhaps 1, depending on the definition you are using.


What is the proper factors of 21?

The proper factor of 21 is 1, 3 and 7


Why is the set of factors of a number not the same as the proper factors of that number?

The proper factors of a number do not include one and the number itself.


What are the proper factors of the number one?

The number one has no proper factors.


What are proper factors of a certain number?

"Proper factors" are all of a number's factors except one and the number itself.


What are the proper factors of 42?

The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42.The proper factors are 1, 2, 3, 6, 7, 14, and 21or 2, 3, 6, 7, 14, and 21 if the number 1 is excluded as it is in some definitions of proper factor.


What is the difference between the factor of a number and a proper factors of a number?

The factors of a number include 1 and the number itself. The proper factors do not.


What are the proper factors of 38?

Proper factors are factors of the number except the number itself. So, with that said, the proper factors of 38 are 1, 2, and 19.


What is the difference between the factors and the proper factors of a number?

The proper factors are the regular factors without one and the number itself.


Why is a set of factors of a number not the same as a set of proper factors of what number?

Proper factors don't include one and the number itself.


Why is the set of factors of a number not the as the set of proper factors?

Proper factors don't include one and the number itself.


What are the proper factors of 64?

The proper factors of 64 are 2, 4, 8, 16 and 32. For proper factors of a number exclude 1 and the number itself from the list of factors.


Does three have proper factors?

No, no prime number has proper factors.


What are the proper factors for the number 1?

One has no proper factors.


What are the proper factors of 21?

1, 3, 7 and 21


What is the term for equal to the sum of its proper factors?

A perfect number is the term for a number that is equal to the sum of its proper divisors. Be careful not to confuse that with proper factors. Proper divisors include 1 but not the number itself. Proper factors don't include either I or the original number.


Why is the set of factors of a number not the same as the set of proper factors of the number?

The set of factors includes one and the number itself. Proper factors do not include those two.


Why is the set of factors of a number not the same as the set of proper factors of that number?

Proper factors of a number do not include 1 or the number itself. For example, all of the factors of 6 are 1, 2, 3, and 6, but the proper factors of 6 are 2 and 3.


Why is the set of factor of a number not the same as the set of proper factors of that number?

Depending on your definition of proper factors, the set of proper factor factors either doesn't include 1 and/or the number itself for a given number.


What is the number of these proper factors 1234671214212842498498147196294?

That is a list of the proper divisors of 588. Most definitions of proper factors do not include the number 1.


What is the math word for when a number and its proper factors add up to be the same?

Perfect number (and it's proper divisors not proper factors)


Why is the set of factors of a number not the same as the set of proper factors?

The set of proper factors doesn't include 1 and the number itself.


What are two factors of a number if 21 is one of the factors?

If 21 is a factor of a number, then the factors of 21 must also be factors. So 3 and 7


What is the difference between factors and proper factors?

Proper factors do not include one and the number itself.