Q: What are the prime factors of the number 46,120,320?

 A: 2, 3, 5, 17, 157

Why are those the prime factors of the number 46,120,320?

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 46,120,320

46,120,320
Factor Arrows
223,060,160
Factor Arrows
211,530,080
Factor Arrows
25,765,040
Factor Arrows
22,882,520
Factor Arrows
21,441,260
Factor Arrows
2720,630
Factor Arrows
2360,315
Factor Arrows
3120,105
Factor Arrows
340,035
Factor Arrows
313,345
Factor Arrows
52,669
Factor Arrows
17157

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, 17, 157

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 5 x 17 x 157 = 46,120,320

This can also be written as 27 x 33 x 51 x 171 x 1571 = 46,120,320

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


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