48 = 2 * 2 * 2 * 2 * 3
28 = 2 * 2 * 7
НОД ( 48 ; 28 ) = 2 * 2 = 4
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42 = 2 * 3 * 7
72 = 2 * 2 * 2 * 3 * 3
НОД ( 42 ; 72 ) = 2 * 3 = 6
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36 = 2 * 2 * 3 * 3
63 = 3 * 3 * 7
НОД ( 36 ; 63 ) = 3 * 3 = 9