To find the factors of a number, start with its prime factors. In the case of 2000, these are 2 x 2 x 2 x 2 x 5 x 5 x 5. Multiplying different combinations of these gives us the whole list of factors: 1 2
2 x 2 = 4
2 x 2 x 2 = 8
2 x 2 x 2 x 2 = 16
5
5 x 5 = 25
5 x 5 x 5 = 125
2 x 5 =10
2 x 5 x 5 = 50
2 x 5 x 5 = 250
2 x 2 x 5 = 20
2 x 2 x 5 x 5 = 100
2 x 2 x 5 x 5 x 5 = 500
2 x 2 x 2 x 5 = 40
2 x 2 x 2 x 5 x 5 = 200
2 x 2 x 2 x 5 x 5 x 5 = 1000
2 x 2 x 2 x 2 x 5 = 80
2 x 2 x 2 x 2 x 5 x 5 = 400
[2 x 2 x 2 x 2 x 5 x 5 x 5 = 2000] So you're quite right, 2000 does have 20 factors.
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Factors of 2000 are 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000 Prime factors of 2000 are 1,2, and 5
1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000. The prime factors of 2000 are 2 and 5. The factors of 2000 are: 1 2 4 5 8 10 16 20 25 40 50 80 100 125 200 250 400 500 1000 2000 If you were to multiply the prime factors to get 2000, it would look like this: 2 x 2 x 2 x 2 x 5 x 5 x5
The factors of 2,000 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000.
20% of 2000= 20% * 2000= 0.2 * 2000= 400
5, 10, and 20 are factors of 20 that are not also factors of 12.