Q: What are the prime factors of the number 626,642,100?

 A: 2, 3, 5, 7, 17, 5851

Why are those the prime factors of the number 626,642,100?

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 626,642,100

626,642,100
Factor Arrows
2313,321,050
Factor Arrows
2156,660,525
Factor Arrows
352,220,175
Factor Arrows
317,406,725
Factor Arrows
53,481,345
Factor Arrows
5696,269
Factor Arrows
799,467
Factor Arrows
175,851

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, 7, 17, 5851

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 5 x 7 x 17 x 5,851 = 626,642,100

This can also be written as 22 x 32 x 52 x 71 x 171 x 5,8511 = 626,642,100

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


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