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35 = 5 x 7 63 = 9 x 7 '7' is the only common factor.
7 is a prime number, and not a factor of 8 or 9. 1, 2, 4, and 8 are factors of 8. 1, 3, and 9 are factors of 9. 7, 8, and have no common factors. So the least common multiple of 7, 8, and 9 are 7 X 8 X 9, which equals 504504
If two or more factors are relatively prime, then they only have 1 as a common factor. Take 7 and 9 for example. The factors of 7 are 1 and 7 The factors of 9 are 1, 3, and 9
Oh, dude, the common factors of 9 and 21 are the numbers that can divide both of them without leaving a remainder. So, the factors of 9 are 1, 3, and 9, while the factors of 21 are 1, 3, 7, and 21. The common factors between them are 1 and 3. Cool, right?
They are all integers. They are all factors of 3150.