The LCM is: 3,600
The GCF is: 9
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The Greatest Common Factor of the two numbers is 9. 288/9 = 32, 405/9 = 45.
The LCM is 3744.
The LCM is 288.
The GCF is 12.
Since 405 is a multiple of 81, it is automatically the LCM of this problem.