A:
Positive:
1 x 1310545155 x 2621090331 x 4227565109 x 1202335155 x 845513545 x 2404673379 x 387857757 x 16895
Negative:
-1 x -131054515-5 x -26210903-31 x -4227565-109 x -1202335-155 x -845513-545 x -240467-3379 x -38785-7757 x -16895
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 131,054,515, 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 | 131,054,515 | |
| -1 | -131,054,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,054,515.
Example:
1 x 131,054,515 = 131,054,515
and
-1 x -131,054,515 = 131,054,515
Notice both answers equal 131,054,515
With that explanation out of the way, let's continue. Next, we take the number 131,054,515 and divide it by 2:
131,054,515 ÷ 2 = 65,527,257.5
If the quotient is a whole number, then 2 and 65,527,257.5 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 | 131,054,515 | |
| -1 | -131,054,515 |
Now, we try dividing 131,054,515 by 3:
131,054,515 ÷ 3 = 43,684,838.3333
If the quotient is a whole number, then 3 and 43,684,838.3333 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 | 131,054,515 | |
| -1 | -131,054,515 |
Let's try dividing by 4:
131,054,515 ÷ 4 = 32,763,628.75
If the quotient is a whole number, then 4 and 32,763,628.75 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 | 131,054,515 | |
| -1 | 131,054,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 109 | 155 | 545 | 3,379 | 7,757 | 16,895 | 38,785 | 240,467 | 845,513 | 1,202,335 | 4,227,565 | 26,210,903 | 131,054,515 |
| -1 | -5 | -31 | -109 | -155 | -545 | -3,379 | -7,757 | -16,895 | -38,785 | -240,467 | -845,513 | -1,202,335 | -4,227,565 | -26,210,903 | -131,054,515 |
Here are some more numbers to try:
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