Q: What are the prime factors of the number 144,258,560?

 A: 2, 5, 37, 1523

Why are those the prime factors of the number 144,258,560?

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 144,258,560

144,258,560
Factor Arrows
272,129,280
Factor Arrows
236,064,640
Factor Arrows
218,032,320
Factor Arrows
29,016,160
Factor Arrows
24,508,080
Factor Arrows
22,254,040
Factor Arrows
21,127,020
Factor Arrows
2563,510
Factor Arrows
2281,755
Factor Arrows
556,351
Factor Arrows
371,523

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, 37, 1523

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 2 x 2 x 5 x 37 x 1,523 = 144,258,560

This can also be written as 29 x 51 x 371 x 1,5231 = 144,258,560

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


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