Q: What are the prime factors of the number 40,205,504?

 A: 2, 643, 977

Why are those the prime factors of the number 40,205,504?

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 40,205,504

40,205,504
Factor Arrows
220,102,752
Factor Arrows
210,051,376
Factor Arrows
25,025,688
Factor Arrows
22,512,844
Factor Arrows
21,256,422
Factor Arrows
2628,211
Factor Arrows
643977

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, 643, 977

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 643 x 977 = 40,205,504

This can also be written as 26 x 6431 x 9771 = 40,205,504

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


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