Given number is 686
The factor tree of 686 is as follows:
| 686 | ||||||||||
| 2 | 343 | |||||||||
| 7 | 49 | |||||||||
| 7 | 7 | |||||||||

686 = 2 x 343
343 = 7 x 49
49 = 7 x 7
If we write into multiples it would be 686 x 2
On splitting 343 further and writing it as multiples of numbers it would be 49 x 7.
On splitting 49 further and writing it as multiples of numbers it would be 7 x 7.
Here are examples of Factor tree calculations.
Here we are providing different methods to find the factors of the number 686. They are splitting numbers and prime factors.
Splitting Numbers
We can divide the number into either of its two factors. In other words, we are looking for the numbers that when multiplied together eqaul 686. Let’s start with 2 x 7 x 7 x 7 as it results in 686 on multiplying. We will now find the factors or ancestors of split factors, just like in any family tree.
Prime Factors
Let’s take a look at 686 now and we can write as 2 x 7 x 7 x 7 and place those factors on the tree. similarly to prime numbers obtained in the first step 2, 7, 7, 7 obtained here are also prime numbers and we will end up these branches.
1. What is factor tree for 686 ?
Answer: Prime Factors of 686 are 2 x 7 x 7 x 7.
2. What are the Prime Factors of 686 ?
Answer: Prime Factors of 686 are 2 x 7 x 7 x 7.