Here is a factor tree of eight:
8
/ \
4 2
/ \
2 2
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104 8*13 2*4*13 2*2*2*13
Factor tree of 40: 40 20,2 10,2,2 5,2,2,2
Ah, the Lowest Common Factor of 16 and 24. Let's think about this like painting a happy little tree. First, we look at the factors of each number: 16 is 1, 2, 4, 8, 16 and 24 is 1, 2, 3, 4, 6, 8, 12, 24. The lowest common factor they share is 8, like a little squirrel hiding in the branches of our tree.
873 x 29Since both 3 and 29 are prime numbers, the factor tree is complete.
72 / \ 8*9 / \ / \ 4*2*3*3 /\ \ \ \ \ 2*2*2*3*3