Q: What are the prime factors of the number 626,340?

 A: 2, 3, 5, 11, 13, 73

Why are those the prime factors of the number 626,340?

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 626,340

626,340
Factor Arrows
2313,170
Factor Arrows
2156,585
Factor Arrows
352,195
Factor Arrows
510,439
Factor Arrows
11949
Factor Arrows
1373

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, 11, 13, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 11 x 13 x 73 = 626,340

This can also be written as 22 x 31 x 51 x 111 x 131 x 731 = 626,340

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


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