Question

a number that has only three identical factors is called a ______.

Answer 1

Answer: "squares of primes"

For example: prime factorization of 8 is 2 x 2 x 2.

Answer 2

As it turns out, the only positive integers with exactly three factors are the squares of primes. For instance, the factors of 9 are 1, 3, and 9, and the factors of 49 are 1

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