Q: What are the prime factors of the number 1,864,320?

 A: 2, 3, 5, 971

Why are those the prime factors of the number 1,864,320?

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 1,864,320

1,864,320
Factor Arrows
2932,160
Factor Arrows
2466,080
Factor Arrows
2233,040
Factor Arrows
2116,520
Factor Arrows
258,260
Factor Arrows
229,130
Factor Arrows
214,565
Factor Arrows
34,855
Factor Arrows
5971

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, 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 3 x 5 x 971 = 1,864,320

This can also be written as 27 x 31 x 51 x 9711 = 1,864,320

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


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