The prime factors of 105 are 3, 5, and 7.
The prime factors of 126 are 2, 3, 3, and 7.
Therefore the prime factors that 105 and 126 have in common are 3, and 7.
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The common factor of 125 and 126 is 1.
As a product of its prime factors: 2*3*3*7 = 126 or as 2*32*7 = 126
As a product of its prime factors: 2*3*3*7 = 126
If you mean the product of its prime factors then it is: 2*3*3*7 = 126
To find the highest common factor (HCF) of 126 and 300, you can use the method of prime factorization. First, break down 126 and 300 into their prime factors: 126 = 2 x 3 x 3 x 7 and 300 = 2 x 2 x 3 x 5 x 5. Then, identify the common prime factors shared by both numbers, which are 2 and 3. Multiply these common factors together to get the HCF, which is 2 x 3 = 6. Therefore, the highest common factor of 126 and 300 is 6.