140
70,2
35,2,2
7,5,2,2
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(140) = 2 * (70) (70) = 2 * (35) (35) = 5 * 7 Prime factors of 140: 2,2,5 and 7
The prime factor tree of 280 is:140,270,2,235,2,2,27,5,2,2,2
It is 7 because as a product of its prime factors: 2*2*5*7 = 140 or as 22*5*7 = 140
factor trees and prime factor trees are the same thing with different names.
the prime factor of 5