# Factor tree for 643

Here you can find the answer to questions related to: Factor tree for 643 or how to draw the factor tree for 643. Use the calculator below to draw the factors tree of any number if the it is factorable and has less than 15 factors.

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## How to draw the factor tree

The procedure below applies to any non-prime number.

- Find 2 factors of the number;
- Look at the 2 factors and determine if at least one of them is not prime;
- If it is not a prime factor it;
- Repeat this process until all factors are prime.

Supose you want to find the factor tree of 32. In this case, you show use the folowing steps:

32 / \ 2 16 / \ 2 8 / \ 2 4 / \ 2 2 |
32 is not prime --> divide by 2
16 is not prime --> divide by 2 8 is not prime --> divide by 2 4 is not prime --> divide by 2 2 is prime --> stop |

Note that these dividers (in this case all are equal to 2) are the prime factors. They are also called the leaves of the factor tree.