# Primes & Factors

Every whole number greater than 1 is either prime or a product of primes that is unique apart from order, such as 84 = 2 × 2 × 3 × 7. From that factorization come the divisors, the greatest common factor (GCF) and the least common multiple (LCM): the GCF of 84 and 36 is 12.

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