The least common factor of any set of integers is 1.
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GCF(189, 441, 63) = 21.
The GCF is: 63
The LCM is 1323.
The factors of 441 are: 1 3 7 9 21 49 63 147 441 The prime factors are: 3, 7
The LCM of 27 and 63 is 189. The LCM of 81 and 441 is 3969. The LCM of all four is 3969.