Q: What are the prime factors of the number 21,063,456?

 A: 2, 3, 24379

Why are those the prime factors of the number 21,063,456?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 21,063,456

21,063,456
Factor Arrows
210,531,728
Factor Arrows
25,265,864
Factor Arrows
22,632,932
Factor Arrows
21,316,466
Factor Arrows
2658,233
Factor Arrows
3219,411
Factor Arrows
373,137
Factor Arrows
324,379

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 24379

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 24,379 = 21,063,456

This can also be written as 25 x 33 x 24,3791 = 21,063,456

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


More Examples

Here are some more numbers to try:

Try the factor calculator

Explore more about the number 21,063,456:


Ask a Question