A:
Positive:
1 x 187916055 x 37583217 x 268451535 x 536903137 x 137165685 x 27433959 x 195953919 x 4795
Negative:
-1 x -18791605-5 x -3758321-7 x -2684515-35 x -536903-137 x -137165-685 x -27433-959 x -19595-3919 x -4795
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 18,791,605, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 18,791,605 | |
| -1 | -18,791,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,791,605.
Example:
1 x 18,791,605 = 18,791,605
and
-1 x -18,791,605 = 18,791,605
Notice both answers equal 18,791,605
With that explanation out of the way, let's continue. Next, we take the number 18,791,605 and divide it by 2:
18,791,605 ÷ 2 = 9,395,802.5
If the quotient is a whole number, then 2 and 9,395,802.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,791,605 | |
| -1 | -18,791,605 |
Now, we try dividing 18,791,605 by 3:
18,791,605 ÷ 3 = 6,263,868.3333
If the quotient is a whole number, then 3 and 6,263,868.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,791,605 | |
| -1 | -18,791,605 |
Let's try dividing by 4:
18,791,605 ÷ 4 = 4,697,901.25
If the quotient is a whole number, then 4 and 4,697,901.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 18,791,605 | |
| -1 | 18,791,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 137 | 685 | 959 | 3,919 | 4,795 | 19,595 | 27,433 | 137,165 | 536,903 | 2,684,515 | 3,758,321 | 18,791,605 |
| -1 | -5 | -7 | -35 | -137 | -685 | -959 | -3,919 | -4,795 | -19,595 | -27,433 | -137,165 | -536,903 | -2,684,515 | -3,758,321 | -18,791,605 |
Here are some more numbers to try:
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