The greatest common multiple of 8 and 20 is 4.
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The Greatest Common Factor (GCF) is: 4 .The greatest common multiple of any set of integers is infinite.
The Least Common Multiple (LCM) for 8 20 48 is 240.
The least common multiple of two numbers is the product of the two numbers divided by their greatest common factor. The greatest common factor of 4 and 8 is 8. (See related question "What is the greatest common factor of 4 and 8?" for this calculation.) So, the least common multiple is 4 x 8 ÷ 4 = 8. Common multiples of 4 and 8 include 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, etc. Although 16 is a common multiple, it is not the least common multiple.
The greatest common factor of the numbers 8 and 20 is 4.
For the values: 20, 14, 8 the LCM is: 280