Q: What are the prime factors of the number 2,251,800?

 A: 2, 3, 5, 139

Why are those the prime factors of the number 2,251,800?

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 2,251,800

2,251,800
Factor Arrows
21,125,900
Factor Arrows
2562,950
Factor Arrows
2281,475
Factor Arrows
393,825
Factor Arrows
331,275
Factor Arrows
310,425
Factor Arrows
33,475
Factor Arrows
5695
Factor Arrows
5139

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, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 5 x 139 = 2,251,800

This can also be written as 23 x 34 x 52 x 1391 = 2,251,800

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


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