Q: What are the prime factors of the number 17,400,320?

 A: 2, 5, 7, 971

Why are those the prime factors of the number 17,400,320?

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 17,400,320

17,400,320
Factor Arrows
28,700,160
Factor Arrows
24,350,080
Factor Arrows
22,175,040
Factor Arrows
21,087,520
Factor Arrows
2543,760
Factor Arrows
2271,880
Factor Arrows
2135,940
Factor Arrows
267,970
Factor Arrows
233,985
Factor Arrows
56,797
Factor Arrows
7971

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, 7, 971

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 2 x 2 x 2 x 5 x 7 x 971 = 17,400,320

This can also be written as 29 x 51 x 71 x 9711 = 17,400,320

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


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