Q: What are the prime factors of the number 613,664,240?

 A: 2, 5, 7, 37, 4231

Why are those the prime factors of the number 613,664,240?

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 613,664,240

613,664,240
Factor Arrows
2306,832,120
Factor Arrows
2153,416,060
Factor Arrows
276,708,030
Factor Arrows
238,354,015
Factor Arrows
57,670,803
Factor Arrows
71,095,829
Factor Arrows
7156,547
Factor Arrows
374,231

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, 7, 37, 4231

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 7 x 7 x 37 x 4,231 = 613,664,240

This can also be written as 24 x 51 x 72 x 371 x 4,2311 = 613,664,240

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


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