Q: What are the prime factors of the number 64,706,040?

 A: 2, 3, 5, 7, 317

Why are those the prime factors of the number 64,706,040?

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 64,706,040

64,706,040
Factor Arrows
232,353,020
Factor Arrows
216,176,510
Factor Arrows
28,088,255
Factor Arrows
32,696,085
Factor Arrows
3898,695
Factor Arrows
3299,565
Factor Arrows
399,855
Factor Arrows
333,285
Factor Arrows
311,095
Factor Arrows
52,219
Factor Arrows
7317

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, 5, 7, 317

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 3 x 5 x 7 x 317 = 64,706,040

This can also be written as 23 x 36 x 51 x 71 x 3171 = 64,706,040

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


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