A:
Positive:
1 x 872428711 x 79311713 x 67109919 x 459173143 x 61009169 x 51623209 x 41743247 x 35321361 x 241671859 x 46932197 x 39712717 x 3211
Negative:
-1 x -8724287-11 x -793117-13 x -671099-19 x -459173-143 x -61009-169 x -51623-209 x -41743-247 x -35321-361 x -24167-1859 x -4693-2197 x -3971-2717 x -3211
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 8,724,287, 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 | 8,724,287 | |
| -1 | -8,724,287 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,724,287.
Example:
1 x 8,724,287 = 8,724,287
and
-1 x -8,724,287 = 8,724,287
Notice both answers equal 8,724,287
With that explanation out of the way, let's continue. Next, we take the number 8,724,287 and divide it by 2:
8,724,287 ÷ 2 = 4,362,143.5
If the quotient is a whole number, then 2 and 4,362,143.5 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 | 8,724,287 | |
| -1 | -8,724,287 |
Now, we try dividing 8,724,287 by 3:
8,724,287 ÷ 3 = 2,908,095.6667
If the quotient is a whole number, then 3 and 2,908,095.6667 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 | 8,724,287 | |
| -1 | -8,724,287 |
Let's try dividing by 4:
8,724,287 ÷ 4 = 2,181,071.75
If the quotient is a whole number, then 4 and 2,181,071.75 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 | 8,724,287 | |
| -1 | 8,724,287 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 19 | 143 | 169 | 209 | 247 | 361 | 1,859 | 2,197 | 2,717 | 3,211 | 3,971 | 4,693 | 24,167 | 35,321 | 41,743 | 51,623 | 61,009 | 459,173 | 671,099 | 793,117 | 8,724,287 |
| -1 | -11 | -13 | -19 | -143 | -169 | -209 | -247 | -361 | -1,859 | -2,197 | -2,717 | -3,211 | -3,971 | -4,693 | -24,167 | -35,321 | -41,743 | -51,623 | -61,009 | -459,173 | -671,099 | -793,117 | -8,724,287 |
Here are some more numbers to try:
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