A:
Positive:
1 x 121405255 x 242810519 x 63897525 x 48562161 x 19902595 x 127795305 x 39805419 x 28975475 x 255591159 x 104751525 x 79612095 x 5795
Negative:
-1 x -12140525-5 x -2428105-19 x -638975-25 x -485621-61 x -199025-95 x -127795-305 x -39805-419 x -28975-475 x -25559-1159 x -10475-1525 x -7961-2095 x -5795
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 12,140,525, 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 | 12,140,525 | |
| -1 | -12,140,525 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,140,525.
Example:
1 x 12,140,525 = 12,140,525
and
-1 x -12,140,525 = 12,140,525
Notice both answers equal 12,140,525
With that explanation out of the way, let's continue. Next, we take the number 12,140,525 and divide it by 2:
12,140,525 ÷ 2 = 6,070,262.5
If the quotient is a whole number, then 2 and 6,070,262.5 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 | 12,140,525 | |
| -1 | -12,140,525 |
Now, we try dividing 12,140,525 by 3:
12,140,525 ÷ 3 = 4,046,841.6667
If the quotient is a whole number, then 3 and 4,046,841.6667 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 | 12,140,525 | |
| -1 | -12,140,525 |
Let's try dividing by 4:
12,140,525 ÷ 4 = 3,035,131.25
If the quotient is a whole number, then 4 and 3,035,131.25 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 | 12,140,525 | |
| -1 | 12,140,525 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 61 | 95 | 305 | 419 | 475 | 1,159 | 1,525 | 2,095 | 5,795 | 7,961 | 10,475 | 25,559 | 28,975 | 39,805 | 127,795 | 199,025 | 485,621 | 638,975 | 2,428,105 | 12,140,525 |
| -1 | -5 | -19 | -25 | -61 | -95 | -305 | -419 | -475 | -1,159 | -1,525 | -2,095 | -5,795 | -7,961 | -10,475 | -25,559 | -28,975 | -39,805 | -127,795 | -199,025 | -485,621 | -638,975 | -2,428,105 | -12,140,525 |
Here are some more numbers to try:
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