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Best Answer

The factors of 42 are:

1, 2, 3, 6, 7, 14, 21, 42

The factors of 189 are:

1, 3, 7, 9, 21, 27, 63, 189

The factors of 441 are:

1, 3, 7, 9, 21, 49, 63, 147, 441

The common factors are:

1, 3, 7, 21

The Greatest Common Factor:

GCF = 21

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Wiki User

9y ago

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Wiki User

9y ago

You need at least two numbers to find a GCF.

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Wiki User

15y ago

A single number cannot have a greatest common factor because "common" refers to factors that two or more numbers have in common. You have only one, which is 189.

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Wiki User

9y ago

The GCF is 63.

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Wiki User

12y ago

The GCF of 81 and 189 is 27.

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Wiki User

14y ago

GCF of 189 42 and 441 is 1.

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Wiki User

12y ago

It is: 63

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Wiki User

11y ago

1

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Wiki User

15y ago

63

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Q: What is the GCF of 189 42 and 441?
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