Q: What are the prime factors of the number 313,344?

 A: 2, 3, 17

Why are those the prime factors of the number 313,344?

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 313,344

313,344
Factor Arrows
2156,672
Factor Arrows
278,336
Factor Arrows
239,168
Factor Arrows
219,584
Factor Arrows
29,792
Factor Arrows
24,896
Factor Arrows
22,448
Factor Arrows
21,224
Factor Arrows
2612
Factor Arrows
2306
Factor Arrows
2153
Factor Arrows
351
Factor Arrows
317

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, 17

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 17 = 313,344

This can also be written as 211 x 32 x 171 = 313,344

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


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