A:
Positive:
1 x 1241020155 x 2482040319 x 653168583 x 149520595 x 1306337415 x 2990411577 x 786957885 x 15739
Negative:
-1 x -124102015-5 x -24820403-19 x -6531685-83 x -1495205-95 x -1306337-415 x -299041-1577 x -78695-7885 x -15739
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 124,102,015, 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 | 124,102,015 | |
| -1 | -124,102,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 124,102,015.
Example:
1 x 124,102,015 = 124,102,015
and
-1 x -124,102,015 = 124,102,015
Notice both answers equal 124,102,015
With that explanation out of the way, let's continue. Next, we take the number 124,102,015 and divide it by 2:
124,102,015 ÷ 2 = 62,051,007.5
If the quotient is a whole number, then 2 and 62,051,007.5 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 | 124,102,015 | |
| -1 | -124,102,015 |
Now, we try dividing 124,102,015 by 3:
124,102,015 ÷ 3 = 41,367,338.3333
If the quotient is a whole number, then 3 and 41,367,338.3333 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 | 124,102,015 | |
| -1 | -124,102,015 |
Let's try dividing by 4:
124,102,015 ÷ 4 = 31,025,503.75
If the quotient is a whole number, then 4 and 31,025,503.75 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 | 124,102,015 | |
| -1 | 124,102,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 83 | 95 | 415 | 1,577 | 7,885 | 15,739 | 78,695 | 299,041 | 1,306,337 | 1,495,205 | 6,531,685 | 24,820,403 | 124,102,015 |
| -1 | -5 | -19 | -83 | -95 | -415 | -1,577 | -7,885 | -15,739 | -78,695 | -299,041 | -1,306,337 | -1,495,205 | -6,531,685 | -24,820,403 | -124,102,015 |
Here are some more numbers to try:
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