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What are the factors and prime factors of 15?
15 is a composite number because it has factors other than 1 and itself. It is not a prime number. The 4 factors of 15 are 1, 3, 5, and 15. The factor pairs of 15 are 1 x 15 and 3 x 5. The proper factors of 15 are 1, 3, and 5 or, if the definition you are using excludes 1, they are 3 and 5. The prime factors of 15 are 3 and 5. The 2 distinct prime factors (listing each prime factor only once) of 15 are also 3 and 5. The prime factorization of 15 is 3 x 5. 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.)
What is the GCF of 15 and 8?
The prime factors of 8 are 2, 2 and 2 The prime factors of 15 are 3 and 5 The6y have no common factors - other than 1.
What is the greatest common factor of 15 and 77?
The GCF of 15 and 77 is 1. The factors of 15 are 1, 3, 5, and 15. The factors of 77 are 1, 7, 11, and 77. The common factors are 1. Therefore the greatest common factor is 1, which means the two numbers are relatively prime. The greatest common factor can also be determined by prime factors. The prime factors of 15 are 3 and 5. The prime factors of 77 are 7 and 11. There are no common prime factors, so the two numbers are relatively prime, which means their only common factor is 1.
What is 15 as a product of its prime factors?
15 = 3 x 5
What is the greatest common factor of 15 and 39?
The factors of 15 are 1, 3, 5, and 15. The factors of 39 are 1, 3, 13, and 39. The factors they have in common are 1 and 3. Therefore, the greatest common factor is 3. You can also determine the greatest common factor from their prime factors. The prime factors of 15 are 3 and 5. The prime factors of 39 are 3 and 13. The prime factors they have in common are a single 3, so the greatest common factor is 3.
