Q: What are the prime factors of the number 10,042,240?

 A: 2, 5, 13, 17, 71

Why are those the prime factors of the number 10,042,240?

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 10,042,240

10,042,240
Factor Arrows
25,021,120
Factor Arrows
22,510,560
Factor Arrows
21,255,280
Factor Arrows
2627,640
Factor Arrows
2313,820
Factor Arrows
2156,910
Factor Arrows
278,455
Factor Arrows
515,691
Factor Arrows
131,207
Factor Arrows
1771

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, 13, 17, 71

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 13 x 17 x 71 = 10,042,240

This can also be written as 27 x 51 x 131 x 171 x 711 = 10,042,240

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


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