The number is 1.
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126 -- 32 -- 81 -- 24 -- 18 -- 45 -- 69 32 is the only member of this group that is not divisible by 3.
There is no GCF of 32 and 81 because no prime numbers go into either 32 or 81
9 is the largest integer that can divide into both 36 and 81 evenly with no remainder.
32 and 81 have no common factors aside from 1. Therefore the GCF is just 1.
The number is 1.