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321 is a composite number because it has factors other than 1 and itself. It is not a Prime number.

The 4 factors of 321 are 1, 3, 107, and 321.

The factor pairs of 321 are 1 x 321 and 3 x 107.

The proper factors of 321 are 1, 3, and 107 or,

if the definition you are using excludes 1, they are 3 and 107.

The prime factors of 321 are 3 and 107.

The distinct prime factors (listing each prime factor only once) of 321 are also 3 and 107.

The prime factorization of 321 is 3 x 107.

NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.

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Q: What are the factors and prime factors of 321?
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