Q: What are the prime factors of the number 2,256,705?

 A: 3, 5, 11, 47, 97

Why are those the prime factors of the number 2,256,705?

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 2,256,705

2,256,705
Factor Arrows
3752,235
Factor Arrows
3250,745
Factor Arrows
550,149
Factor Arrows
114,559
Factor Arrows
4797

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:

3, 5, 11, 47, 97

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 11 x 47 x 97 = 2,256,705

This can also be written as 32 x 51 x 111 x 471 x 971 = 2,256,705

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


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