Q: What are the prime factors of the number 40,141,440?

 A: 2, 3, 5, 23, 101

Why are those the prime factors of the number 40,141,440?

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 40,141,440

40,141,440
Factor Arrows
220,070,720
Factor Arrows
210,035,360
Factor Arrows
25,017,680
Factor Arrows
22,508,840
Factor Arrows
21,254,420
Factor Arrows
2627,210
Factor Arrows
2313,605
Factor Arrows
3104,535
Factor Arrows
334,845
Factor Arrows
311,615
Factor Arrows
52,323
Factor Arrows
23101

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, 23, 101

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 3 x 3 x 3 x 5 x 23 x 101 = 40,141,440

This can also be written as 27 x 33 x 51 x 231 x 1011 = 40,141,440

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


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