Q: What are the prime factors of the number 171,705,270?

 A: 2, 3, 5, 11, 17, 127, 241

Why are those the prime factors of the number 171,705,270?

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 171,705,270

171,705,270
Factor Arrows
285,852,635
Factor Arrows
328,617,545
Factor Arrows
55,723,509
Factor Arrows
11520,319
Factor Arrows
1730,607
Factor Arrows
127241

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, 17, 127, 241

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 11 x 17 x 127 x 241 = 171,705,270

This can also be written as 21 x 31 x 51 x 111 x 171 x 1271 x 2411 = 171,705,270

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


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