Results: The number 20 is a composite number because 20 can be divided by 1, by itself and at least by 2 and 5. So, it is possible to draw its prime tree. The prime factorization of 20 = 22•5.
What is the factor pairs of 21?
The factors of 21 are the numbers that produce the result as 21 when a pair factor is multiplied together. A factor of a number divides the original number uniformly….Pair Factors of 21.
| Positive pairs | Negative pairs |
|---|---|
| 3 × 7 = 21; (3, 7) | (-3) × (-7) = 21; (-3, -7) |
| 7 × 3 = 21; (7, 3) | (-7) × (-3) = 21; (-7, -3) |
What are the prime factors of the number 21?
21 is divisible by the prime number 3 which results in 7. The result 7 cannot be divided any further as it is a prime number. Hence the prime factors of 21 are 3, 7.
How to draw a factor tree for 21?
Here you can find the answer to questions related to: Factor tree for 21 or how to draw the factor tree for 21. The procedure below applies to any non-prime number. Look at the 2 factors and determine if at least one of them is not prime; Repeat this process until all factors are prime. Supose you want to find the factor tree of 32.
Which is the positive pair factor of 21?
Therefore, the positive pair factors of 21 are (1, 21), (3, 7), (7, 3) and (21, 1) The negative pair factors of 21 are (-1, -21), (-3, -7), (-7, -3) and (-21, -1). Prime Factors of 21 As we know, 21 is a composite number, and it has prime factors.
How do you create a prime factor tree?
Creating a factor tree involves breaking up the composite number into factors of the composite number, until all of the numbers are prime. In the example below, the prime factors are found by dividing 820 by a prime factor, 2, then continuing to divide the result until all factors are prime.
