A:
Positive:
1 x 304210137 x 434585931 x 98132349 x 620837217 x 140189343 x 886911519 x 200272861 x 10633
Negative:
-1 x -30421013-7 x -4345859-31 x -981323-49 x -620837-217 x -140189-343 x -88691-1519 x -20027-2861 x -10633
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 30,421,013, 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 | 30,421,013 | |
| -1 | -30,421,013 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,421,013.
Example:
1 x 30,421,013 = 30,421,013
and
-1 x -30,421,013 = 30,421,013
Notice both answers equal 30,421,013
With that explanation out of the way, let's continue. Next, we take the number 30,421,013 and divide it by 2:
30,421,013 ÷ 2 = 15,210,506.5
If the quotient is a whole number, then 2 and 15,210,506.5 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 | 30,421,013 | |
| -1 | -30,421,013 |
Now, we try dividing 30,421,013 by 3:
30,421,013 ÷ 3 = 10,140,337.6667
If the quotient is a whole number, then 3 and 10,140,337.6667 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 | 30,421,013 | |
| -1 | -30,421,013 |
Let's try dividing by 4:
30,421,013 ÷ 4 = 7,605,253.25
If the quotient is a whole number, then 4 and 7,605,253.25 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 | 30,421,013 | |
| -1 | 30,421,013 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 49 | 217 | 343 | 1,519 | 2,861 | 10,633 | 20,027 | 88,691 | 140,189 | 620,837 | 981,323 | 4,345,859 | 30,421,013 |
| -1 | -7 | -31 | -49 | -217 | -343 | -1,519 | -2,861 | -10,633 | -20,027 | -88,691 | -140,189 | -620,837 | -981,323 | -4,345,859 | -30,421,013 |
Here are some more numbers to try:
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