A:
Positive:
1 x 1213382755 x 2426765519 x 638622525 x 485353195 x 1277245467 x 259825475 x 255449547 x 2218252335 x 519652735 x 443658873 x 1367510393 x 11675
Negative:
-1 x -121338275-5 x -24267655-19 x -6386225-25 x -4853531-95 x -1277245-467 x -259825-475 x -255449-547 x -221825-2335 x -51965-2735 x -44365-8873 x -13675-10393 x -11675
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 121,338,275, 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 | 121,338,275 | |
| -1 | -121,338,275 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,338,275.
Example:
1 x 121,338,275 = 121,338,275
and
-1 x -121,338,275 = 121,338,275
Notice both answers equal 121,338,275
With that explanation out of the way, let's continue. Next, we take the number 121,338,275 and divide it by 2:
121,338,275 ÷ 2 = 60,669,137.5
If the quotient is a whole number, then 2 and 60,669,137.5 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 | 121,338,275 | |
| -1 | -121,338,275 |
Now, we try dividing 121,338,275 by 3:
121,338,275 ÷ 3 = 40,446,091.6667
If the quotient is a whole number, then 3 and 40,446,091.6667 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 | 121,338,275 | |
| -1 | -121,338,275 |
Let's try dividing by 4:
121,338,275 ÷ 4 = 30,334,568.75
If the quotient is a whole number, then 4 and 30,334,568.75 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 | 121,338,275 | |
| -1 | 121,338,275 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 95 | 467 | 475 | 547 | 2,335 | 2,735 | 8,873 | 10,393 | 11,675 | 13,675 | 44,365 | 51,965 | 221,825 | 255,449 | 259,825 | 1,277,245 | 4,853,531 | 6,386,225 | 24,267,655 | 121,338,275 |
| -1 | -5 | -19 | -25 | -95 | -467 | -475 | -547 | -2,335 | -2,735 | -8,873 | -10,393 | -11,675 | -13,675 | -44,365 | -51,965 | -221,825 | -255,449 | -259,825 | -1,277,245 | -4,853,531 | -6,386,225 | -24,267,655 | -121,338,275 |
Here are some more numbers to try:
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