Q: What are the prime factors of the number 256,441,100?

 A: 2, 5, 19, 139, 971

Why are those the prime factors of the number 256,441,100?

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 256,441,100

256,441,100
Factor Arrows
2128,220,550
Factor Arrows
264,110,275
Factor Arrows
512,822,055
Factor Arrows
52,564,411
Factor Arrows
19134,969
Factor Arrows
139971

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, 19, 139, 971

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 19 x 139 x 971 = 256,441,100

This can also be written as 22 x 52 x 191 x 1391 x 9711 = 256,441,100

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


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