25 . (odd number of them)Factors of 26 are 1

2， 25 . (odd number of them)Factors of 26 are 1， Does composite numbers have an odd number of factors? Composite numbers can have either an odd number or an evennumber of fractions.Factors of 25 are 1， 13， 5，。

and 26 . (even number of them) 。