$$\(23 A=2 \times 3^{43}\)$$ $$\(B=16 \times 3^{37}\)$$ (a) Find the highest common factor (HCF) of $$\(A\)$$ and $$\(B\)$$. (1) (b) Express the number $$\(A \times B\)$$ as a product of powers of its prime factors. Give your answer in its simplest form. (2)

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