Q: What are the prime factors of the number 231,312,320?

 A: 2, 5, 71, 10181

Why are those the prime factors of the number 231,312,320?

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 231,312,320

231,312,320
Factor Arrows
2115,656,160
Factor Arrows
257,828,080
Factor Arrows
228,914,040
Factor Arrows
214,457,020
Factor Arrows
27,228,510
Factor Arrows
23,614,255
Factor Arrows
5722,851
Factor Arrows
7110,181

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, 5, 71, 10181

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 5 x 71 x 10,181 = 231,312,320

This can also be written as 26 x 51 x 711 x 10,1811 = 231,312,320

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


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