Q: What are the prime factors of the number 2,316,780?

 A: 2, 3, 5, 61, 211

Why are those the prime factors of the number 2,316,780?

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 2,316,780

2,316,780
Factor Arrows
21,158,390
Factor Arrows
2579,195
Factor Arrows
3193,065
Factor Arrows
364,355
Factor Arrows
512,871
Factor Arrows
61211

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, 61, 211

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 61 x 211 = 2,316,780

This can also be written as 22 x 32 x 51 x 611 x 2111 = 2,316,780

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


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