Respuesta :

What I do is list the factors:
28 = 1 * 2 * 2 * 7 = 1 * 4 * 7
44 = 1 * 2 * 2 * 11 = 1 * 4 * 11
Since 1, 2, and 4 are on both lists, 1, 2, and 4 are the common factors.
1, 2, 4 :)
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