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Q: What factors of twenty are prime numbers?

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2 and 5

Twenty is composite. It has the factors 1, 2, 4 ,5, 10, and 20. Prime numbers have exactly two factors. Composite numbers have three or more.

5,2 and 1 are the prime numbers for twenty.

Some factors are prime numbers.

All numbers have factors. Some factors are prime numbers. These are known as prime factors. Some numbers have some of the same prime factors as other numbers. These are known as common prime factors. 3 is a common prime factor of 12 and 15.

Prime factors are factors that are also prime numbers.

All numbers have factors. Some factors are prime numbers. These are known as prime factors.

list the prime numbers between one and twenty

Prime factors of numbers are small numbers that the bigger (original) number can divide by. The prime factors have to be prime. This means they only have two factors, itself and one.

The set of prime factors of the numbers from 1 to 15,000 would be the set of prime numbers between 1 and 15,000. The link below has a list of the first 10,000 prime numbers, so if you take the primes less than 15,000, you will have the set of prime factors of the first 15,000 numbers. For prime factors of individual numbers, check the related question, "What are the prime factors of the numbers from 1 to 200?" Also check for WikiAnswers questions in the form of "What are the prime factors of __?" and "What are the factors and prime factors of __?"

Yes, prime numbers have factors. A prime number has only two factors(1 and itself).

Prime numbers have only two factors whereas composite numbers have more than two factors