Q: What are the prime factors of the number 331,120,998?

 A: 2, 3, 13, 53, 26699

Why are those the prime factors of the number 331,120,998?

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 331,120,998

331,120,998
Factor Arrows
2165,560,499
Factor Arrows
355,186,833
Factor Arrows
318,395,611
Factor Arrows
131,415,047
Factor Arrows
5326,699

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, 13, 53, 26699

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 13 x 53 x 26,699 = 331,120,998

This can also be written as 21 x 32 x 131 x 531 x 26,6991 = 331,120,998

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


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