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One way to determine the greatest common factor is to find all the factors of the numbers and compare them.

The factors of 26 are 1, 2, 13, and 26.

The factors of 1220 are 1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, and 1220.

The common factors are 1 and 2. Therefore, the greatest common factor is 2.

The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.

The prime factors of 26 are 2 and 13.

The prime factors of 1220 are 2, 2, 5, and 61.

The prime factors in common are a single 2, so the greatest common factor is 2.

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16y ago

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