Q: What are the prime factors of the number 72,840,704?

 A: 2, 113, 1259

Why are those the prime factors of the number 72,840,704?

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 72,840,704

72,840,704
Factor Arrows
236,420,352
Factor Arrows
218,210,176
Factor Arrows
29,105,088
Factor Arrows
24,552,544
Factor Arrows
22,276,272
Factor Arrows
21,138,136
Factor Arrows
2569,068
Factor Arrows
2284,534
Factor Arrows
2142,267
Factor Arrows
1131,259

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, 113, 1259

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 2 x 113 x 1,259 = 72,840,704

This can also be written as 29 x 1131 x 1,2591 = 72,840,704

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


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