The components of 21 space the numbers that develop the an outcome as 21 once a pair element is multiply together. A factor of a number divides the initial number uniformly. 

The determinants of 21 space 1, 3, 7 and also 21. 

Factor bag of the number 21 space the number that result in the original number multiplying them together. To find the determinants of a number, 21, we have the right to use the administrate method.

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How to find the determinants of 21?

Go v the adhering to steps to find determinants of 21.

Step 1: First, compose the number 21

Step 2: uncover the two numbers, which outcomes in 21 under the multiplication, say 3 and 7, such that 3 × 7 = 21.

Step 3: We know that 3 and also 7 space prime numbers with just two factors, i.e., one and also the number itself. 

The factors of 3 = 3 × 1

The components of 7 = 7 x 1

So, us cannot more factorize them.

Step 4: Therefore, the administrate of 21 have the right to be expressed together 21 = 3 × 7 × 1

Step 7: Finally, write down all the unique numbers which us can attain from the above process.

Factors the 21

1, 3, 7, and also 21

Pair components of 21

To uncover the pair components of 21, main point the two numbers to acquire the original number together 21. We deserve to write both confident and an unfavorable integers in pairs as shown below:

Positive pairsNegative pairs
1 × 21 = 21; (1, 21)(-1) × (-21) = 21; (-1, -21)
3 × 7 = 21; (3, 7)(-3) × (-7) = 21; (-3, -7)
7 × 3 = 21; (7, 3)(-7) × (-3) = 21; (-7, -3)
21 × 1 = 21; (21, 1)(-21) × (-1) = 21; (-21, -1)

Therefore, the hopeful pair determinants of 21 are (1, 21), (3, 7), (7, 3) and also (21, 1)

The an unfavorable pair factors of 21 are (-1, -21), (-3, -7), (-7, -3) and also (-21, -1).

Prime determinants of 21

As us know, 21 is a composite number, and also it has actually prime factors. Now let us discover the prime factors of 21.

The first step is to division the number 21 v the the smallest prime number, i.e. 2.

21 ÷ 2 = 10.5

Factors must be entirety numbers, therefore 2 cannot be the factor of 21. Hence, proceed with the following prime number, i.e. 3.

21 ÷ 3 = 7

Thus, 3 is one of the prime factors of 21.

Now, division 7 by the numbers which room prime.

7 ÷ 2 = 3.5

7 ÷ 3 = 2.333

7 ÷÷ 5 = 1.4

7 ÷ 7 = 1

We have received number 1 in ~ the finish of the division process; thus, we cannot proceed further. 

So, the prime components of 21 are 3 and 7, where 2 and 7 are the prime numbers.

Prime factorisation the 21 is 3 × 7.

Some the the vital facts about the components of 21 are provided below:

The number of factors of 21 is 4.The sum of all components of 21 is same to 32.The product of all factors of 21 is equal to square that 21 or 21 times of 21.

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Learn much more about factors, multiples and also prime components of various other numbers, visit www.ptcouncil.net also, download BYJU’S – The finding out App.

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The multiples that 21 incorporate 21, 42, 63, 84, 105, 126, 147, 168, 189, 210, etc.,The factors of 21 room 1, 3, 7 and 21.