Q: What are the prime factors of the number 15,685,632?

 A: 2, 3, 23, 37

Why are those the prime factors of the number 15,685,632?

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 15,685,632

15,685,632
Factor Arrows
27,842,816
Factor Arrows
23,921,408
Factor Arrows
21,960,704
Factor Arrows
2980,352
Factor Arrows
2490,176
Factor Arrows
2245,088
Factor Arrows
2122,544
Factor Arrows
261,272
Factor Arrows
230,636
Factor Arrows
215,318
Factor Arrows
27,659
Factor Arrows
32,553
Factor Arrows
3851
Factor Arrows
2337

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, 23, 37

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 2 x 2 x 2 x 2 x 3 x 3 x 23 x 37 = 15,685,632

This can also be written as 211 x 32 x 231 x 371 = 15,685,632

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


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