A:
Positive:
1 x 2576871017 x 3681244319 x 1356247923 x 11203787133 x 1937497161 x 1600541437 x 5896733059 x 84239
Negative:
-1 x -257687101-7 x -36812443-19 x -13562479-23 x -11203787-133 x -1937497-161 x -1600541-437 x -589673-3059 x -84239
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 257,687,101, 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 | 257,687,101 | |
| -1 | -257,687,101 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 257,687,101.
Example:
1 x 257,687,101 = 257,687,101
and
-1 x -257,687,101 = 257,687,101
Notice both answers equal 257,687,101
With that explanation out of the way, let's continue. Next, we take the number 257,687,101 and divide it by 2:
257,687,101 ÷ 2 = 128,843,550.5
If the quotient is a whole number, then 2 and 128,843,550.5 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 | 257,687,101 | |
| -1 | -257,687,101 |
Now, we try dividing 257,687,101 by 3:
257,687,101 ÷ 3 = 85,895,700.3333
If the quotient is a whole number, then 3 and 85,895,700.3333 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 | 257,687,101 | |
| -1 | -257,687,101 |
Let's try dividing by 4:
257,687,101 ÷ 4 = 64,421,775.25
If the quotient is a whole number, then 4 and 64,421,775.25 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 | 257,687,101 | |
| -1 | 257,687,101 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 23 | 133 | 161 | 437 | 3,059 | 84,239 | 589,673 | 1,600,541 | 1,937,497 | 11,203,787 | 13,562,479 | 36,812,443 | 257,687,101 |
| -1 | -7 | -19 | -23 | -133 | -161 | -437 | -3,059 | -84,239 | -589,673 | -1,600,541 | -1,937,497 | -11,203,787 | -13,562,479 | -36,812,443 | -257,687,101 |
Here are some more numbers to try:
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