Q: What are the prime factors of the number 919,392?

 A: 2, 3, 61, 157

Why are those the prime factors of the number 919,392?

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 919,392

919,392
Factor Arrows
2459,696
Factor Arrows
2229,848
Factor Arrows
2114,924
Factor Arrows
257,462
Factor Arrows
228,731
Factor Arrows
39,577
Factor Arrows
61157

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, 61, 157

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 61 x 157 = 919,392

This can also be written as 25 x 31 x 611 x 1571 = 919,392

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


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