There cannot be common factors of just one number. To be common there need to be at least two numbers.
Chat with our AI personalities
The factors of 63 are 1, 3, 7, 9, 21 and 63. For them to be common, they need to be compared to another set of factors.
The Greatest Common Factor of 21, 63, 84: 21
The highest common factor is 9
Since 7 is a factor of 63, it is automatically the GCF.
Greatest common factor for 35 and 63 and 84 is 7.
Since 63 is a factor of 693, it is automatically the GCF of this problem.