A:
Positive:
1 x 13116328743 x 305030953 x 247477967 x 1957661859 x 1526932279 x 575532881 x 455273551 x 36937
Negative:
-1 x -131163287-43 x -3050309-53 x -2474779-67 x -1957661-859 x -152693-2279 x -57553-2881 x -45527-3551 x -36937
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 131,163,287, 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 | 131,163,287 | |
| -1 | -131,163,287 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,163,287.
Example:
1 x 131,163,287 = 131,163,287
and
-1 x -131,163,287 = 131,163,287
Notice both answers equal 131,163,287
With that explanation out of the way, let's continue. Next, we take the number 131,163,287 and divide it by 2:
131,163,287 ÷ 2 = 65,581,643.5
If the quotient is a whole number, then 2 and 65,581,643.5 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 | 131,163,287 | |
| -1 | -131,163,287 |
Now, we try dividing 131,163,287 by 3:
131,163,287 ÷ 3 = 43,721,095.6667
If the quotient is a whole number, then 3 and 43,721,095.6667 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 | 131,163,287 | |
| -1 | -131,163,287 |
Let's try dividing by 4:
131,163,287 ÷ 4 = 32,790,821.75
If the quotient is a whole number, then 4 and 32,790,821.75 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 | 131,163,287 | |
| -1 | 131,163,287 |
If you did it right, you will end up with this table:
| 1 | 43 | 53 | 67 | 859 | 2,279 | 2,881 | 3,551 | 36,937 | 45,527 | 57,553 | 152,693 | 1,957,661 | 2,474,779 | 3,050,309 | 131,163,287 |
| -1 | -43 | -53 | -67 | -859 | -2,279 | -2,881 | -3,551 | -36,937 | -45,527 | -57,553 | -152,693 | -1,957,661 | -2,474,779 | -3,050,309 | -131,163,287 |
Here are some more numbers to try:
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