A:
Positive:
1 x 3042076713 x 234005919 x 160109379 x 385073247 x 1231611027 x 296211501 x 202671559 x 19513
Negative:
-1 x -30420767-13 x -2340059-19 x -1601093-79 x -385073-247 x -123161-1027 x -29621-1501 x -20267-1559 x -19513
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 30,420,767, 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 | 30,420,767 | |
| -1 | -30,420,767 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,420,767.
Example:
1 x 30,420,767 = 30,420,767
and
-1 x -30,420,767 = 30,420,767
Notice both answers equal 30,420,767
With that explanation out of the way, let's continue. Next, we take the number 30,420,767 and divide it by 2:
30,420,767 ÷ 2 = 15,210,383.5
If the quotient is a whole number, then 2 and 15,210,383.5 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 | 30,420,767 | |
| -1 | -30,420,767 |
Now, we try dividing 30,420,767 by 3:
30,420,767 ÷ 3 = 10,140,255.6667
If the quotient is a whole number, then 3 and 10,140,255.6667 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 | 30,420,767 | |
| -1 | -30,420,767 |
Let's try dividing by 4:
30,420,767 ÷ 4 = 7,605,191.75
If the quotient is a whole number, then 4 and 7,605,191.75 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 | 30,420,767 | |
| -1 | 30,420,767 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 79 | 247 | 1,027 | 1,501 | 1,559 | 19,513 | 20,267 | 29,621 | 123,161 | 385,073 | 1,601,093 | 2,340,059 | 30,420,767 |
| -1 | -13 | -19 | -79 | -247 | -1,027 | -1,501 | -1,559 | -19,513 | -20,267 | -29,621 | -123,161 | -385,073 | -1,601,093 | -2,340,059 | -30,420,767 |
Here are some more numbers to try:
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