Math Tutor Explains: What are the Factors of 861?

As your math tutor, I’m here to guide you through the different types of factors of 861. Understanding factors is key to mastering multiplication, division, and prime numbers. Here’s a breakdown:

• Factors of 861: 1, 3, 7, 21, 41, 123, 287, 861

• Sum of Factors of 861: 1344

• Negative Factors of 861: -1, -3, -7, -21, -41, -123, -287, -861

• Prime Factors of 861: 3, 7, 41

• Prime Factorization of 861: 3^1 × 7^1 × 41^1

There are two main ways a math tutor would explain how to find the factors of 861: using factor pairs and prime factorization. Let’s explore both!

As your math tutor, I’m here to help you break down factor pairs of 861 step by step!

Factor pairs of 861 are any two numbers that, when multiplied together, equal 861. The question to ask is “what two numbers multiplied together equal 861?” Every factor can be paired with another factor, and multiplying the two will result in 861.

To find the factor pairs of 861, follow these steps:

Step 1:

Find the smallest prime number that is larger than 1, and is a factor of 861. For reference, the first prime numbers to check are 2, 3, 5, 7, 11, and 13. In this case, the smallest factor that’s a prime number larger than 1 is 3.

Step 2:

Divide 861 by the smallest prime factor, in this case, 3:

861 ÷ 3 = 287

3 and 287 will make a new factor pair.

Step 3:

Repeat Steps 1 and 2, using 287 as the new focus. Find the smallest prime factor that isn’t 1, and divide 287 by that number. In this case, 7 is the new smallest prime factor:

287 ÷ 7 = 41

Remember that this new factor pair is only for the factors of 287, not 861. So, to finish the factor pair for 861, you’d multiply 3 and 7 before pairing with 41:

3 x 7 = 21

Step 4:

Repeat this process until there are no longer any prime factors larger than one to divide by. At the end, you should have the full list of factor pairs.

Here are all the factor pairs for 861:

(1, 861), (3, 287), (7, 123), (21, 41)

So, to list all the factors of 861: 1, 3, 7, 21, 41, 123, 287, 861

The negative factors of 861 would be: -1, -3, -7, -21, -41, -123, -287, -861

Now you’ve got it! A math tutor would always encourage you to practice with different numbers to reinforce your understanding of factor pairs. Try another one!

To find the prime factorization of 861, we break it down step by step until only prime factors remain. Then, we express 861 as a product of these prime factors multiplied together. Let’s go through the process and simplify it like a math tutor would!

The process of finding the prime factorization of 861 only has a few differences from the above method of finding the factors of 861. Instead of ensuring we find the right factor pairs, we continue to factor each step until we are left with only the list of smallest prime factors greater than 1.

Here are the steps for finding the prime factorization of 861:

Step 1:

Find the smallest prime number that is larger than 1, and is a factor of 861. For reference, the first prime numbers to check are 2, 3, 5, 7, 11, and 13. In this case, the smallest factor that’s a prime number larger than 1 is 3.

Step 2:

Divide 861 by the smallest prime factor, in this case, 3

861 ÷ 3 = 287

3 becomes the first number in our prime factorization.

Step 3:

Repeat Steps 1 and 2, using 287 as the new focus. Find the smallest prime factor that isn’t 1, and divide 287 by that number. The smallest prime factor you pick for 287 will then be the next prime factor. If you keep repeating this process, there will be a point where there will be no more prime factors left, which leaves you with the prime factors for prime factorization.

So, the unique prime factors of 861 are: 3, 7, 41

Practice your factoring skills by exploring how to factor other numbers, like the ones below:

Factors of 121 - The factors of 121 are 1, 11, 121

Factors of 146 - The factors of 146 are 1, 2, 73, 146

Factors of 63 - The factors of 63 are 1, 3, 7, 9, 21, 63

Factors of 69 - The factors of 69 are 1, 3, 23, 69