Q: What are the prime factors of the number 257,800,448?

 A: 2, 173, 5821

Why are those the prime factors of the number 257,800,448?

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 257,800,448

257,800,448
Factor Arrows
2128,900,224
Factor Arrows
264,450,112
Factor Arrows
232,225,056
Factor Arrows
216,112,528
Factor Arrows
28,056,264
Factor Arrows
24,028,132
Factor Arrows
22,014,066
Factor Arrows
21,007,033
Factor Arrows
1735,821

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, 173, 5821

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 173 x 5,821 = 257,800,448

This can also be written as 28 x 1731 x 5,8211 = 257,800,448

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


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