There is really no such thing as a "greatest common multiple". Once you find the least common multiple of a set of numbers, you can keep adding the LCM to itself over and over again. Each new number you get will be a common multiple of your set of numbers, but each new number will always be larger than the previous. This means that you can keep adding while the number approaches infinity and you will still never find a greatest multiple.
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The greatest common factor of 26 and 65 is 13.13x2=2613x5=65
13 and 26's highest common factor is 13.
Factor them.2 x 13 = 263 x 13 = 392 x 3 x 13 = 78Select the common factor.The GCF is 13.
The GCF of 26, 52 and 65 is 13.
The GCF is 13.