Q: What are the prime factors of the number 69,847,040?

 A: 2, 5, 19, 359

Why are those the prime factors of the number 69,847,040?

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 69,847,040

69,847,040
Factor Arrows
234,923,520
Factor Arrows
217,461,760
Factor Arrows
28,730,880
Factor Arrows
24,365,440
Factor Arrows
22,182,720
Factor Arrows
21,091,360
Factor Arrows
2545,680
Factor Arrows
2272,840
Factor Arrows
2136,420
Factor Arrows
268,210
Factor Arrows
234,105
Factor Arrows
56,821
Factor Arrows
19359

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, 359

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 2 x 2 x 5 x 19 x 359 = 69,847,040

This can also be written as 211 x 51 x 191 x 3591 = 69,847,040

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


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