It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
The greatest common factor of 25 and 100 is 25.
The greatest common factor (GCF) is 25.
The greatest common factor of 25 and 175 is 25.
The greatest common factor (GCF) is 25.
The greatest common factor of 25 and 76 is 1.
The greatest common factor of 25 and 34 is one.
The greatest common factor of 9 and 25 is 1
The greatest common factor of 25 and 33 is 1.
The greatest common factor of 25 and 80 is 5.
The greatest common factor of 140 and 25 is 5.
25 is the greatest common factor of 75 and 25. 3 x 25 = 75.
The Greatest Common Factor of 25, 125, 200: 25