Q: What are the prime factors of the number 8,970,240?

 A: 2, 3, 5, 73

Why are those the prime factors of the number 8,970,240?

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 8,970,240

8,970,240
Factor Arrows
24,485,120
Factor Arrows
22,242,560
Factor Arrows
21,121,280
Factor Arrows
2560,640
Factor Arrows
2280,320
Factor Arrows
2140,160
Factor Arrows
270,080
Factor Arrows
235,040
Factor Arrows
217,520
Factor Arrows
28,760
Factor Arrows
24,380
Factor Arrows
22,190
Factor Arrows
21,095
Factor Arrows
3365
Factor Arrows
573

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, 73

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 2 x 2 x 2 x 2 x 3 x 5 x 73 = 8,970,240

This can also be written as 213 x 31 x 51 x 731 = 8,970,240

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


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