Q: What are the prime factors of the number 355,223,500?

 A: 2, 5, 17, 23, 79

Why are those the prime factors of the number 355,223,500?

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 355,223,500

355,223,500
Factor Arrows
2177,611,750
Factor Arrows
288,805,875
Factor Arrows
517,761,175
Factor Arrows
53,552,235
Factor Arrows
5710,447
Factor Arrows
1741,791
Factor Arrows
231,817
Factor Arrows
2379

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, 5, 17, 23, 79

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 5 x 17 x 23 x 23 x 79 = 355,223,500

This can also be written as 22 x 53 x 171 x 232 x 791 = 355,223,500

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


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