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- $ A{\\\text{ }} = \\\{ 1;2;3;4;6;12\\\}$ .
- $ A = \\\left\\\{ {1;\\\,2;\\\,3;\\\,4;\\\,6;\\\,9;\\\,12;\\\,18;\\\,36} \\\right\\\}.$
- $ A = \\\{ 2;3;4;6;8;10;12\\\}$ .
- $ A = \\\{ 1;2;3;4;6;8;12\\\}$ .