All numbers have a common factor of 1. Sometimes that's the only common factor.
Prime numbers have one distinct prime factor.
The only common factor of these numbers is 1.
Prime Numbers
composite
The only number with just one factor is 1.
The only common factor of those two numbers is 1.
Numbers whose only common factor is 1.
The only common factor is 1 since the numbers are coprime.
The least common factor of any set of numbers is 1.
No. The GCF of any two numbers is also a factor of their difference. The difference between consecutive numbers is 1 so their GCF must also be a factor of 1. The only factor of 1 is 1 - and hence the result.
Only the number 1 is a factor of all other integers.