Factor tree of 40:
40
20,2
10,2,2
5,2,2,2
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No, 3 is not a factor of 40.
80 / \ 40 2 / \ 20 2 / \ 10 2 / \ 5 2 24*5
There are various examples (since 40 has 6 proper divisors, or 8 in total), but the most simple is grouping it into a power of each value:40/ \ 8 5 /|\ 2 2 2Thus, we can conclude that 40 = 23 * 5.
Here is a factor tree of eight: 8 / \ 4 2 / \ 2 2
80 2, 40 2, 2, 20 2, 2, 2, 10 2, 2, 2, 2, 5