Pointless, 251 is prime.
1 is the highest common factor of 91 and 251.
the factors of 753 are 3 and 251 and 251 have only one factor that is 1 hence 8 is not a factor of 753
1506 = 2 X 753 = 2 X 3 X 251. So 251 is the greatest prime factor of 1506.
148 over 251 = 148/251. It cannot be reduced any further since the greatest common factor of 148 and 251 is 1.
factor tree of 216
IT IS PRIME there is no factor tree
Factor tree of 204
The factor tree of 50:5025,25,5,25025,25,5,2
21
83 is prime. No tree.
The prime factor tree of 280 is:140,270,2,235,2,2,27,5,2,2,2
Factor Tree of 20: ........20 ......../ \ .......4 5 ....../ \ .....2 2