The common factors of 72 and 123 are: 1 and 3
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To find the common factors of 123 and 555, we first need to determine the factors of each number. The factors of 123 are 1, 3, 41, and 123. The factors of 555 are 1, 3, 5, 15, 37, 111, and 555. The common factors of 123 and 555 are 1 and 3. Therefore, they have 2 common factors.
The common factors of 72 and 81 are: 1, 3, and 9
The common factors of 16 and 72 are 1, 2, 4, 8
The common factors of 24 and 72 are: 1, 2, 3, 4, 6, 8, 12, and 24The common factors are: 1, 2, 3, 4, 6, 8, 12, 24
The common factors of 64 and 72 are 1, 2, 4 and 8.