Q: What are the prime factors of the number 19,709,088?

 A: 2, 3, 7, 139, 211

Why are those the prime factors of the number 19,709,088?

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 19,709,088

19,709,088
Factor Arrows
29,854,544
Factor Arrows
24,927,272
Factor Arrows
22,463,636
Factor Arrows
21,231,818
Factor Arrows
2615,909
Factor Arrows
3205,303
Factor Arrows
729,329
Factor Arrows
139211

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, 7, 139, 211

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 139 x 211 = 19,709,088

This can also be written as 25 x 31 x 71 x 1391 x 2111 = 19,709,088

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


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