547 is a Prime number that has only 2 factors which are itself and one
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Itself and one because 547 is a prime number
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 547 is prime.
That's a prime factor.
13 is a prime number. The only prime factor of a prime number is the number itself.
A prime number has only one prime factor, and that prime factor is the number itself.