The tree method is a diagram that does not display properly in this answer area.
3 is a prime number. Prime numbers don't have factor trees. The factors of 3 are 1 and 3.
40 20,2 10,2,2 5,2,2,2
Factors of 15 are: 1 3 5 and 15 of which 3 and 5 are prime factors
81 27,3 9,3,3 3,3,3,3
As a product of its prime factors: 3*5*31 = 465
The tree method is a diagram that does not display properly in this answer area.
396 198,2 99,2,2 33,3,2,2 11,3,3,2,2
470 Divide by two. 235,2 Divide by five. 47,5,2 Stop. All the factors are prime.
378 189,2 63,3,2 21,3,3,2 7,3,3,3,2
186 2, 93 2, 3, 31
3 is a prime number. Prime numbers don't have factor trees. The factors of 3 are 1 and 3.
145 5,29
44 22,2 11,2,2
an arithmetic tree an is formula using prime and composite number to express its factors.
The prime factors of 86 are 2 and 43
40 20,2 10,2,2 5,2,2,2