Q: What are the prime factors of the number 40,576,977?

 A: 3, 7, 17, 73, 173

Why are those the prime factors of the number 40,576,977?

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 40,576,977

40,576,977
Factor Arrows
313,525,659
Factor Arrows
34,508,553
Factor Arrows
31,502,851
Factor Arrows
7214,693
Factor Arrows
1712,629
Factor Arrows
73173

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:

3, 7, 17, 73, 173

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 7 x 17 x 73 x 173 = 40,576,977

This can also be written as 33 x 71 x 171 x 731 x 1731 = 40,576,977

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


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