Q: What are the prime factors of the number 11,658,400?

 A: 2, 5, 13, 19, 59

Why are those the prime factors of the number 11,658,400?

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 11,658,400

11,658,400
Factor Arrows
25,829,200
Factor Arrows
22,914,600
Factor Arrows
21,457,300
Factor Arrows
2728,650
Factor Arrows
2364,325
Factor Arrows
572,865
Factor Arrows
514,573
Factor Arrows
131,121
Factor Arrows
1959

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, 19, 59

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 13 x 19 x 59 = 11,658,400

This can also be written as 25 x 52 x 131 x 191 x 591 = 11,658,400

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


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