1089
363 x 3
121 x 3 x 3
11 x 11 x 3 x 3 1089
363,3
121,3,3
11,11,3,3
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1089 squared = 1,185,921
factor tree of 216
The factors of 1089 are: 1, 3, 9, 11, 33, 99, 121, 363, 1089.
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