Q: What are the prime factors of the number 40,110,000?

 A: 2, 3, 5, 7, 191

Why are those the prime factors of the number 40,110,000?

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 40,110,000

40,110,000
Factor Arrows
220,055,000
Factor Arrows
210,027,500
Factor Arrows
25,013,750
Factor Arrows
22,506,875
Factor Arrows
3835,625
Factor Arrows
5167,125
Factor Arrows
533,425
Factor Arrows
56,685
Factor Arrows
51,337
Factor Arrows
7191

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, 7, 191

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 5 x 5 x 5 x 7 x 191 = 40,110,000

This can also be written as 24 x 31 x 54 x 71 x 1911 = 40,110,000

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


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