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Anonymous
The least common factor of any set of integers is 1.
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The least common multiple of 45 , 54 , 72 = 1,080
18, 36, 54, 72, 90
An LCF is the lowest common factor.
18
GCF is 18:54 = 18 x 372 = 18 x 490 = 18 x 5