A:
Positive:
1 x 1316407755 x 263281557 x 1880582517 x 774357525 x 526563135 x 376116585 x 1548715119 x 1106225175 x 752233425 x 309743595 x 2212452975 x 44249
Negative:
-1 x -131640775-5 x -26328155-7 x -18805825-17 x -7743575-25 x -5265631-35 x -3761165-85 x -1548715-119 x -1106225-175 x -752233-425 x -309743-595 x -221245-2975 x -44249
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 131,640,775, 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 | 131,640,775 | |
| -1 | -131,640,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,640,775.
Example:
1 x 131,640,775 = 131,640,775
and
-1 x -131,640,775 = 131,640,775
Notice both answers equal 131,640,775
With that explanation out of the way, let's continue. Next, we take the number 131,640,775 and divide it by 2:
131,640,775 ÷ 2 = 65,820,387.5
If the quotient is a whole number, then 2 and 65,820,387.5 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 | 131,640,775 | |
| -1 | -131,640,775 |
Now, we try dividing 131,640,775 by 3:
131,640,775 ÷ 3 = 43,880,258.3333
If the quotient is a whole number, then 3 and 43,880,258.3333 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 | 131,640,775 | |
| -1 | -131,640,775 |
Let's try dividing by 4:
131,640,775 ÷ 4 = 32,910,193.75
If the quotient is a whole number, then 4 and 32,910,193.75 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 | 131,640,775 | |
| -1 | 131,640,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 17 | 25 | 35 | 85 | 119 | 175 | 425 | 595 | 2,975 | 44,249 | 221,245 | 309,743 | 752,233 | 1,106,225 | 1,548,715 | 3,761,165 | 5,265,631 | 7,743,575 | 18,805,825 | 26,328,155 | 131,640,775 |
| -1 | -5 | -7 | -17 | -25 | -35 | -85 | -119 | -175 | -425 | -595 | -2,975 | -44,249 | -221,245 | -309,743 | -752,233 | -1,106,225 | -1,548,715 | -3,761,165 | -5,265,631 | -7,743,575 | -18,805,825 | -26,328,155 | -131,640,775 |
Here are some more numbers to try:
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