Q: What are the prime factors of the number 901,440?

 A: 2, 3, 5, 313

Why are those the prime factors of the number 901,440?

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 901,440

901,440
Factor Arrows
2450,720
Factor Arrows
2225,360
Factor Arrows
2112,680
Factor Arrows
256,340
Factor Arrows
228,170
Factor Arrows
214,085
Factor Arrows
34,695
Factor Arrows
31,565
Factor Arrows
5313

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, 313

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 3 x 5 x 313 = 901,440

This can also be written as 26 x 32 x 51 x 3131 = 901,440

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


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