Find the possible orders for matrices A ...

Find the possible orders for matrices A and B if they have 18 and 19 elements respectively.

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The orders possible for A are ` 1 xx 18, 2 xx 9, 3 xx 6, 6 xx3, 9 xx 2, 18 xx 1` the orders possible for B are `1 xx 19 " and " 19 xx 1`

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