a prime #
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I assume you mean to find the prime factorization of 405. If so: 34 x 5
As a product of its prime factors: 3*7 = 21
As a product of its prime factors: 3*7*7 = 147
(of an integer) being the product of two or more factors greater than one; not prime.
Numbers that have 2 factors are prime numbers; Numbers that have 4 factors are either: * the cube of a prime; or * the product of two different primes; Numbers that have 8 factors are either: * a prime to the power 7; * the product of a prime cubed and different prime; * the product of three different primes.