Q: What are the prime factors of the number 207,361,440?

 A: 2, 3, 5, 11, 13, 19, 53

Why are those the prime factors of the number 207,361,440?

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 207,361,440

207,361,440
Factor Arrows
2103,680,720
Factor Arrows
251,840,360
Factor Arrows
225,920,180
Factor Arrows
212,960,090
Factor Arrows
26,480,045
Factor Arrows
32,160,015
Factor Arrows
3720,005
Factor Arrows
5144,001
Factor Arrows
1113,091
Factor Arrows
131,007
Factor Arrows
1953

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, 11, 13, 19, 53

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 11 x 13 x 19 x 53 = 207,361,440

This can also be written as 25 x 32 x 51 x 111 x 131 x 191 x 531 = 207,361,440

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


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