A:
Positive:
1 x 181993217 x 259990319 x 957859133 x 136837193 x 94297709 x 256691351 x 134713667 x 4963
Negative:
-1 x -18199321-7 x -2599903-19 x -957859-133 x -136837-193 x -94297-709 x -25669-1351 x -13471-3667 x -4963
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 18,199,321, 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 | 18,199,321 | |
| -1 | -18,199,321 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,199,321.
Example:
1 x 18,199,321 = 18,199,321
and
-1 x -18,199,321 = 18,199,321
Notice both answers equal 18,199,321
With that explanation out of the way, let's continue. Next, we take the number 18,199,321 and divide it by 2:
18,199,321 ÷ 2 = 9,099,660.5
If the quotient is a whole number, then 2 and 9,099,660.5 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 | 18,199,321 | |
| -1 | -18,199,321 |
Now, we try dividing 18,199,321 by 3:
18,199,321 ÷ 3 = 6,066,440.3333
If the quotient is a whole number, then 3 and 6,066,440.3333 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 | 18,199,321 | |
| -1 | -18,199,321 |
Let's try dividing by 4:
18,199,321 ÷ 4 = 4,549,830.25
If the quotient is a whole number, then 4 and 4,549,830.25 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 | 18,199,321 | |
| -1 | 18,199,321 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 193 | 709 | 1,351 | 3,667 | 4,963 | 13,471 | 25,669 | 94,297 | 136,837 | 957,859 | 2,599,903 | 18,199,321 |
| -1 | -7 | -19 | -133 | -193 | -709 | -1,351 | -3,667 | -4,963 | -13,471 | -25,669 | -94,297 | -136,837 | -957,859 | -2,599,903 | -18,199,321 |
Here are some more numbers to try:
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