Q: What are the prime factors of the number 19,751,936?

 A: 2, 19289

Why are those the prime factors of the number 19,751,936?

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 19,751,936

19,751,936
Factor Arrows
29,875,968
Factor Arrows
24,937,984
Factor Arrows
22,468,992
Factor Arrows
21,234,496
Factor Arrows
2617,248
Factor Arrows
2308,624
Factor Arrows
2154,312
Factor Arrows
277,156
Factor Arrows
238,578
Factor Arrows
219,289

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, 19289

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 19,289 = 19,751,936

This can also be written as 210 x 19,2891 = 19,751,936

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


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