Common factors of 20 and 28: 1, 2, and 4.
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The factors of 20 are 1, 2, 4, 5, 10, and 20 The factors of 28 are 1, 2, 4, 7, 14, and 28. Common factors of 20 and 28: 1, 2, and 4.
The common factors of 28 and 84 are 1,2,4,7,14 and 28.
The common factors of 28 and 84 are 1,2,4,7,14 and 28
Answer: 1 The factors of 28 are 1, 2, 4, 7, 14, and 28. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. The common factors are 1, 2, and 4; the least (smallest) common factor is 1.
The common factors of 28 and 63 are: 1 and 7