One factor pair: 31 = 1 x 31
Chat with our AI personalities
The factor pair for 31 is 1*31. Since 31 is prime, it has only one factor pair.
20 has 3 factor pairs. Pairs are (1,20), (2,10) and (9,9)
"Dose" is a measured portion of a medicine. I am not aware of any factor pairs related to dose 18 or any other measured quantities of medication!18 does have 3 factor pairs.
There are infinitely many pairs: the simplest pair is 1 and 270
Two pairs: 1 and 26 2 and 13