Q: What are the prime factors of the number 331,475,280?

 A: 2, 3, 5, 1381147

Why are those the prime factors of the number 331,475,280?

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 331,475,280

331,475,280
Factor Arrows
2165,737,640
Factor Arrows
282,868,820
Factor Arrows
241,434,410
Factor Arrows
220,717,205
Factor Arrows
36,905,735
Factor Arrows
51,381,147

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, 1381147

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 1,381,147 = 331,475,280

This can also be written as 24 x 31 x 51 x 1,381,1471 = 331,475,280

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


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