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Earn +20 ptsQ: How many factors does the number 21 have?
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What are all of the factors for the number 21?
The factors of 21 are: 1, 3, 7, 21.
How many factor pairs does 21 have?
The factor pairs of 21 are:1, 213, 7Therefore, the number 21 has two pairs of positive integer factors.
What number s are?
The factors of 21 are 1, 3, 7, and 21. The only factor of 21 that is a composite number is 21.
Is 21 a prime or composite number?
21 is a Composite Number. A prime number is a whole number that only has two factors which are itself and one. A composite number has factors in addition to one and itself. 21 is divisible by 3 and 7.
How many factors does 21 have?
Four factors.
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