Q: What are the prime factors of the number 40,432,000?

 A: 2, 5, 7, 19

Why are those the prime factors of the number 40,432,000?

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 40,432,000

40,432,000
Factor Arrows
220,216,000
Factor Arrows
210,108,000
Factor Arrows
25,054,000
Factor Arrows
22,527,000
Factor Arrows
21,263,500
Factor Arrows
2631,750
Factor Arrows
2315,875
Factor Arrows
563,175
Factor Arrows
512,635
Factor Arrows
52,527
Factor Arrows
7361
Factor Arrows
1919

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, 19

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 5 x 5 x 5 x 7 x 19 x 19 = 40,432,000

This can also be written as 27 x 53 x 71 x 192 = 40,432,000

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


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