Q: What are the prime factors of the number 23,379,840?

 A: 2, 3, 5, 11, 41

Why are those the prime factors of the number 23,379,840?

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 23,379,840

23,379,840
Factor Arrows
211,689,920
Factor Arrows
25,844,960
Factor Arrows
22,922,480
Factor Arrows
21,461,240
Factor Arrows
2730,620
Factor Arrows
2365,310
Factor Arrows
2182,655
Factor Arrows
360,885
Factor Arrows
320,295
Factor Arrows
36,765
Factor Arrows
32,255
Factor Arrows
5451
Factor Arrows
1141

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, 41

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 3 x 3 x 3 x 3 x 5 x 11 x 41 = 23,379,840

This can also be written as 27 x 34 x 51 x 111 x 411 = 23,379,840

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


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