A:
Positive:
1 x 1240215137 x 1771735911 x 1127468377 x 1610669311 x 3987832177 x 569693421 x 362535179 x 23947
Negative:
-1 x -124021513-7 x -17717359-11 x -11274683-77 x -1610669-311 x -398783-2177 x -56969-3421 x -36253-5179 x -23947
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 124,021,513, 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 | 124,021,513 | |
| -1 | -124,021,513 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 124,021,513.
Example:
1 x 124,021,513 = 124,021,513
and
-1 x -124,021,513 = 124,021,513
Notice both answers equal 124,021,513
With that explanation out of the way, let's continue. Next, we take the number 124,021,513 and divide it by 2:
124,021,513 ÷ 2 = 62,010,756.5
If the quotient is a whole number, then 2 and 62,010,756.5 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 | 124,021,513 | |
| -1 | -124,021,513 |
Now, we try dividing 124,021,513 by 3:
124,021,513 ÷ 3 = 41,340,504.3333
If the quotient is a whole number, then 3 and 41,340,504.3333 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 | 124,021,513 | |
| -1 | -124,021,513 |
Let's try dividing by 4:
124,021,513 ÷ 4 = 31,005,378.25
If the quotient is a whole number, then 4 and 31,005,378.25 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 | 124,021,513 | |
| -1 | 124,021,513 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 311 | 2,177 | 3,421 | 5,179 | 23,947 | 36,253 | 56,969 | 398,783 | 1,610,669 | 11,274,683 | 17,717,359 | 124,021,513 |
| -1 | -7 | -11 | -77 | -311 | -2,177 | -3,421 | -5,179 | -23,947 | -36,253 | -56,969 | -398,783 | -1,610,669 | -11,274,683 | -17,717,359 | -124,021,513 |
Here are some more numbers to try:
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