When one of the numbers is a factor of the other.
One is.
17 and 4 have a difference of 13 and is a factor pair of 68
yes
A square number
Numbers with more than one factor pair are composite numbers.
That happens when one of the numbers is a factor of the other.
84,142,228,321,414,612,7
When one of the numbers is a factor of the other.
Those numbers are called factors. A pair of those is called a factor pair.
Prime numbers have one factor pair.
A number can't have a factor greater than itself, so the GCF of a pair of numbers can't ever be greater than the smaller number. The GCF of 9 and 18 is 9.
A prime number
Any pair of prime numbers
84 factor is
337
factor