Q: What are the prime factors of the number 645,324,510?

 A: 2, 3, 5, 97, 211, 1051

Why are those the prime factors of the number 645,324,510?

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 645,324,510

645,324,510
Factor Arrows
2322,662,255
Factor Arrows
3107,554,085
Factor Arrows
521,510,817
Factor Arrows
97221,761
Factor Arrows
2111,051

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, 97, 211, 1051

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 97 x 211 x 1,051 = 645,324,510

This can also be written as 21 x 31 x 51 x 971 x 2111 x 1,0511 = 645,324,510

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


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