Q: What are the prime factors of the number 26,215,440?

 A: 2, 3, 5, 19, 5749

Why are those the prime factors of the number 26,215,440?

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 26,215,440

26,215,440
Factor Arrows
213,107,720
Factor Arrows
26,553,860
Factor Arrows
23,276,930
Factor Arrows
21,638,465
Factor Arrows
3546,155
Factor Arrows
5109,231
Factor Arrows
195,749

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, 5, 19, 5749

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 19 x 5,749 = 26,215,440

This can also be written as 24 x 31 x 51 x 191 x 5,7491 = 26,215,440

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


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