Q: What are the prime factors of the number 240,021,144?

 A: 2, 3, 11, 151, 223

Why are those the prime factors of the number 240,021,144?

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 240,021,144

240,021,144
Factor Arrows
2120,010,572
Factor Arrows
260,005,286
Factor Arrows
230,002,643
Factor Arrows
310,000,881
Factor Arrows
33,333,627
Factor Arrows
31,111,209
Factor Arrows
3370,403
Factor Arrows
1133,673
Factor Arrows
151223

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, 11, 151, 223

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 11 x 151 x 223 = 240,021,144

This can also be written as 23 x 34 x 111 x 1511 x 2231 = 240,021,144

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


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