Q: What are the prime factors of the number 331,033,416?

 A: 2, 3, 7, 40213

Why are those the prime factors of the number 331,033,416?

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 331,033,416

331,033,416
Factor Arrows
2165,516,708
Factor Arrows
282,758,354
Factor Arrows
241,379,177
Factor Arrows
313,793,059
Factor Arrows
71,970,437
Factor Arrows
7281,491
Factor Arrows
740,213

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, 7, 40213

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 7 x 7 x 7 x 40,213 = 331,033,416

This can also be written as 23 x 31 x 73 x 40,2131 = 331,033,416

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


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