The numbers 27, 49, 57, and 63 are all composite numbers because each has factors other than 1 and the number itself.
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LCM of 27 & 5 = 27 x 5 = 135. LCM of a prime number and a composite number is equal to their product if the composite number is not a multiple of the prime number.
No, prime factorizations consist entirely of prime numbers.
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composite numbers
no 5 is not a composite number 10 15 20 and 25 are composite