Q: What are the prime factors of the number 31,353,240?

 A: 2, 3, 5, 227, 1151

Why are those the prime factors of the number 31,353,240?

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 31,353,240

31,353,240
Factor Arrows
215,676,620
Factor Arrows
27,838,310
Factor Arrows
23,919,155
Factor Arrows
31,306,385
Factor Arrows
5261,277
Factor Arrows
2271,151

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, 5, 227, 1151

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 227 x 1,151 = 31,353,240

This can also be written as 23 x 31 x 51 x 2271 x 1,1511 = 31,353,240

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


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