Q: What are the prime factors of the number 153,110,208?

 A: 2, 3, 19, 47

Why are those the prime factors of the number 153,110,208?

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 153,110,208

153,110,208
Factor Arrows
276,555,104
Factor Arrows
238,277,552
Factor Arrows
219,138,776
Factor Arrows
29,569,388
Factor Arrows
24,784,694
Factor Arrows
22,392,347
Factor Arrows
3797,449
Factor Arrows
1941,971
Factor Arrows
192,209
Factor Arrows
4747

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, 19, 47

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 3 x 19 x 19 x 47 x 47 = 153,110,208

This can also be written as 26 x 31 x 192 x 472 = 153,110,208

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


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