A:
Positive:
1 x 25368487111 x 2306226123 x 1102977753 x 4786507253 x 1002707583 x 4351371219 x 20810913409 x 18919
Negative:
-1 x -253684871-11 x -23062261-23 x -11029777-53 x -4786507-253 x -1002707-583 x -435137-1219 x -208109-13409 x -18919
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 253,684,871, 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 | 253,684,871 | |
| -1 | -253,684,871 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 253,684,871.
Example:
1 x 253,684,871 = 253,684,871
and
-1 x -253,684,871 = 253,684,871
Notice both answers equal 253,684,871
With that explanation out of the way, let's continue. Next, we take the number 253,684,871 and divide it by 2:
253,684,871 ÷ 2 = 126,842,435.5
If the quotient is a whole number, then 2 and 126,842,435.5 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 | 253,684,871 | |
| -1 | -253,684,871 |
Now, we try dividing 253,684,871 by 3:
253,684,871 ÷ 3 = 84,561,623.6667
If the quotient is a whole number, then 3 and 84,561,623.6667 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 | 253,684,871 | |
| -1 | -253,684,871 |
Let's try dividing by 4:
253,684,871 ÷ 4 = 63,421,217.75
If the quotient is a whole number, then 4 and 63,421,217.75 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 | 253,684,871 | |
| -1 | 253,684,871 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 53 | 253 | 583 | 1,219 | 13,409 | 18,919 | 208,109 | 435,137 | 1,002,707 | 4,786,507 | 11,029,777 | 23,062,261 | 253,684,871 |
| -1 | -11 | -23 | -53 | -253 | -583 | -1,219 | -13,409 | -18,919 | -208,109 | -435,137 | -1,002,707 | -4,786,507 | -11,029,777 | -23,062,261 | -253,684,871 |
Here are some more numbers to try:
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