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Answer: There are none.

There is neither a greatest common factor nor common factors of a single number, such as 147, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.

Examples:

The common factors of 14 and 147 are 1 and 7; the greatest common factor is 7.

The common factors of 147 and 171 are 1 and 3; the greatest common factor is 3.

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Wiki User

14y ago
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Wiki User

12y ago

One method is to express each number in terms of its prime factors.

63 = 3 x 3 x 7 = 32 x 7.

147 = 3 x 7 x 7 = 3 x 72.

The factors that both numbers have in common are 3 and 7.

The Greatest Common Factor (GCF) is 3 x 7 = 21.

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ADITYA GOYAT

Lvl 5
2y ago

The Greatest Common Factor (GCF) for 63 and 147, notation CGF(63,147), is 21. Explanation: The factors of 63 are 1,3,7,9,21,63; The factors of 147 are 1,3,7,21,49,147.

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Wiki User

11y ago

It is 3

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Anonymous

Lvl 1
3y ago

330

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Q: What are the Greatest common factor of 63 and 147?
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