To find the greatest common factor (GCF) of 20, 48, and 32, we first need to find the prime factorization of each number. The prime factorization of 20 is 2^2 x 5, 48 is 2^4 x 3, and 32 is 2^5. To find the GCF, we look for the highest power of common prime factors in all three numbers, which in this case is 2^2. Therefore, the GCF of 20, 48, and 32 is 4.
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