Several numbers have the greatest common factor of 1. These numbers are often called prime numbers. Their only factors are 1 and themselves.
The least common factor of any set of integers is 1. If the numbers are co-prime, then the greatest common factor will also be 1 and thus the least and greatest common factors will be the same.
The greatest common factor (GCF) is: 1
The greatest common factor of the numbers 9 and 5 is 1.
That their greatest common factor is 1
It is just 1
The greatest common factor of the numbers 284 and 263 is 1.
Short answer: There are none. There is neither a greatest common factor nor common factors of a single number, such as ??, 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 1 and 3 are only 1; the greatest common factor is 1. The common factors of 1 and 111 are only 1; the greatest common factor is 1. Note: Since the only factor of 1 is 1, when finding the greatest common factor of 1 and another number, the only possible common factor and greatest common factor is 1.
The greatest common factor of two or more prime numbers is 1.
The greatest common factor for the numbers 3 and 37 is 1.
If the greatest common factor is 1, then the numbers are said to be co-prime or relatively prime.
The numbers are coprime so their greatest common factor is 1.
Any two or more prime numbers have 1 as the greatest common factor.