Q: What are the prime factors of the number 240,005,115?

 A: 3, 5, 7, 23, 157, 211

Why are those the prime factors of the number 240,005,115?

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 240,005,115

240,005,115
Factor Arrows
380,001,705
Factor Arrows
326,667,235
Factor Arrows
55,333,447
Factor Arrows
7761,921
Factor Arrows
2333,127
Factor Arrows
157211

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:

3, 5, 7, 23, 157, 211

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 7 x 23 x 157 x 211 = 240,005,115

This can also be written as 32 x 51 x 71 x 231 x 1571 x 2111 = 240,005,115

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


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