prime factor vs divisor

prime factor and divisor both are nouns.

Word	Noun	Adjective	Verb	Adverb
prime factor	Yes	No	No	No
divisor	Yes	No	No	No

As nouns, divisor is a hypernym of prime factor; that is, divisor is a word with a broader meaning than prime factor:

prime factor: the prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity
divisor: one of two or more integers that can be exactly divided into another integer

Other hypernyms of prime factor include factor.

prime factor (noun)	divisor (noun)
the prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity	the number by which a dividend is divided
	one of two or more integers that can be exactly divided into another integer