Q: What are the prime factors of the number 278,685,360?

 A: 2, 3, 5, 29, 1483

Why are those the prime factors of the number 278,685,360?

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 278,685,360

278,685,360
Factor Arrows
2139,342,680
Factor Arrows
269,671,340
Factor Arrows
234,835,670
Factor Arrows
217,417,835
Factor Arrows
35,805,945
Factor Arrows
31,935,315
Factor Arrows
3645,105
Factor Arrows
3215,035
Factor Arrows
543,007
Factor Arrows
291,483

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, 29, 1483

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 29 x 1,483 = 278,685,360

This can also be written as 24 x 34 x 51 x 291 x 1,4831 = 278,685,360

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


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