Q: What are the prime factors of the number 29,361,920?

 A: 2, 5, 7, 29, 113

Why are those the prime factors of the number 29,361,920?

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 29,361,920

29,361,920
Factor Arrows
214,680,960
Factor Arrows
27,340,480
Factor Arrows
23,670,240
Factor Arrows
21,835,120
Factor Arrows
2917,560
Factor Arrows
2458,780
Factor Arrows
2229,390
Factor Arrows
2114,695
Factor Arrows
522,939
Factor Arrows
73,277
Factor Arrows
29113

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, 7, 29, 113

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 2 x 5 x 7 x 29 x 113 = 29,361,920

This can also be written as 28 x 51 x 71 x 291 x 1131 = 29,361,920

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


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