The LCM is: 1,323.
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The GCF of 189, 315, and 441 is: 63
The least common multiple of the numbers 27, 63, 81 and 441 is 3,969.
The GCF is 63.
441 / 252 = 1 r 189 252 / 189 = 1 r 63 189 / 63 = 3 r 0 The hcf of 441 and 252 is 63
That depends upon the other number(s) with which 441 has common factors - it will be the highest factor that is common to 441 and the other number(s). It will be one of 441's factors, that is one of: 1, 3, 7, 9, 21, 49, 63, 147, 441