What Are the Factors of 21?

Answer

The factors of 21 are 1, 3, 7 and 21. 21 is a composite number and this means that it has factors other than 1 and itself. The prime factors of 21 are 3 and 7.
Q&A Related to "What Are the Factors of 21"
1, 3, 7 and 21.
http://wiki.answers.com/Q/What_is_the_factor_21
Because 21 is a factor of 63. 21 is the greatest factor of 21. A larger number doesn't exist.
http://wiki.answers.com/Q/Why_is_21_the_greatest_c...
It's incomplete. 21 isn't prime. 42. 21,2. 7,3,2. 2 x 3 x 7 = 42.
http://wiki.answers.com/Q/Why_is_is_the_prime_fact...
The GCF is 7.
http://wiki.answers.com/Q/What_is_the_greatest_com...
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