Q: What are the prime factors of the number 726,235,104?

 A: 2, 3, 7, 17, 151, 421

Why are those the prime factors of the number 726,235,104?

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 726,235,104

726,235,104
Factor Arrows
2363,117,552
Factor Arrows
2181,558,776
Factor Arrows
290,779,388
Factor Arrows
245,389,694
Factor Arrows
222,694,847
Factor Arrows
37,564,949
Factor Arrows
71,080,707
Factor Arrows
1763,571
Factor Arrows
151421

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, 7, 17, 151, 421

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 7 x 17 x 151 x 421 = 726,235,104

This can also be written as 25 x 31 x 71 x 171 x 1511 x 4211 = 726,235,104

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


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