The factors of 18 are: 1, 2, 3, 6, 9, 18
The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56
The common factors are: 1, 2
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The only common factor is 2, so the LCM = 18 x 56 / 2 = 9 x 56 = 504
The least common factor is: 1
No.
The common factors of 56 and 18 are 1 and 2.
The greatest common factor is 18.