A:
Positive:
1 x 12507262117 x 735721329 x 4312849107 x 1168903493 x 2536971819 x 687592371 x 527513103 x 40307
Negative:
-1 x -125072621-17 x -7357213-29 x -4312849-107 x -1168903-493 x -253697-1819 x -68759-2371 x -52751-3103 x -40307
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 125,072,621, 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 | 125,072,621 | |
| -1 | -125,072,621 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 125,072,621.
Example:
1 x 125,072,621 = 125,072,621
and
-1 x -125,072,621 = 125,072,621
Notice both answers equal 125,072,621
With that explanation out of the way, let's continue. Next, we take the number 125,072,621 and divide it by 2:
125,072,621 ÷ 2 = 62,536,310.5
If the quotient is a whole number, then 2 and 62,536,310.5 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 | 125,072,621 | |
| -1 | -125,072,621 |
Now, we try dividing 125,072,621 by 3:
125,072,621 ÷ 3 = 41,690,873.6667
If the quotient is a whole number, then 3 and 41,690,873.6667 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 | 125,072,621 | |
| -1 | -125,072,621 |
Let's try dividing by 4:
125,072,621 ÷ 4 = 31,268,155.25
If the quotient is a whole number, then 4 and 31,268,155.25 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 | 125,072,621 | |
| -1 | 125,072,621 |
If you did it right, you will end up with this table:
| 1 | 17 | 29 | 107 | 493 | 1,819 | 2,371 | 3,103 | 40,307 | 52,751 | 68,759 | 253,697 | 1,168,903 | 4,312,849 | 7,357,213 | 125,072,621 |
| -1 | -17 | -29 | -107 | -493 | -1,819 | -2,371 | -3,103 | -40,307 | -52,751 | -68,759 | -253,697 | -1,168,903 | -4,312,849 | -7,357,213 | -125,072,621 |
Here are some more numbers to try:
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