You need at least two numbers to find something in common.
The common factors of 55 and 80 are 1 and 5
The common factors of 36 and 80 are: 1, 2, and 4
The common factors of 68 and 80 are 1, 2 and 4.
Common factors of 72 and 80 are: 1, 2, 4, and 8.
The common factors are: 1, 5
The prime factors of 80 are 2 and 5. For them to be common, they need to be compared to another set of prime factors.
The common factors are: 1, 2, 4
Since 40 is a factor of 80, all of its factors are common.
Short answer: There are none.There is neither a greatest common factor nor common factors of a single number, such as 80, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.Examples:The common factors of 14 and 80 are 1 and 2; the greatest common factor is 2.The common factors of 32 and 80 are 1, 2, 4, 8, and 16; the greatest common factor is 16.The common factors of 60 and 80 are 1, 2, 4, 5, 10, and 20; the greatest common factor is 20.The common factors of 70 and 80 are 1, 2, 5, and 10; the greatest common factor is 10.The common factors of 80 and 102 are 1 and 2; the greatest common factor is 2.The factors of 80 are 1,2,4,5,8,10,16,20,40 and 80. For them to have something in common, you need another set of factors to compare them to.
The greatest common factor of 54 and 80 is 2.
The GCF of 69 and 80 is 1. There are no other common factors.
The factors of 32: 1,2,5,8,10,16,20,32 The factors of 80: 1,2,4,5,8,10,16,20,40 The GCF (greatest common factor) of the numbers is 16!!