105
35,3
7,5,3
The GCF is 21.
1,3,5,7,15,21,35,105
63
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
15 and 7 21 and 5
Factor Tree of 20: ........20 ......../ \ .......4 5 ....../ \ .....2 2