Q: What are the prime factors of the number 40,163,680?

 A: 2, 5, 173, 1451

Why are those the prime factors of the number 40,163,680?

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 40,163,680

40,163,680
Factor Arrows
220,081,840
Factor Arrows
210,040,920
Factor Arrows
25,020,460
Factor Arrows
22,510,230
Factor Arrows
21,255,115
Factor Arrows
5251,023
Factor Arrows
1731,451

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, 173, 1451

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 173 x 1,451 = 40,163,680

This can also be written as 25 x 51 x 1731 x 1,4511 = 40,163,680

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


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