Q: What are the prime factors of the number 13,955,760?

 A: 2, 3, 5, 7, 13, 71

Why are those the prime factors of the number 13,955,760?

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 13,955,760

13,955,760
Factor Arrows
26,977,880
Factor Arrows
23,488,940
Factor Arrows
21,744,470
Factor Arrows
2872,235
Factor Arrows
3290,745
Factor Arrows
396,915
Factor Arrows
332,305
Factor Arrows
56,461
Factor Arrows
7923
Factor Arrows
1371

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, 7, 13, 71

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 5 x 7 x 13 x 71 = 13,955,760

This can also be written as 24 x 33 x 51 x 71 x 131 x 711 = 13,955,760

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


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