A:
Positive:
1 x 426390655 x 85278137 x 609129535 x 121825949 x 87018579 x 539735245 x 174037395 x 107947553 x 771052203 x 193552765 x 154213871 x 11015
Negative:
-1 x -42639065-5 x -8527813-7 x -6091295-35 x -1218259-49 x -870185-79 x -539735-245 x -174037-395 x -107947-553 x -77105-2203 x -19355-2765 x -15421-3871 x -11015
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 42,639,065, 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 | 42,639,065 | |
| -1 | -42,639,065 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,639,065.
Example:
1 x 42,639,065 = 42,639,065
and
-1 x -42,639,065 = 42,639,065
Notice both answers equal 42,639,065
With that explanation out of the way, let's continue. Next, we take the number 42,639,065 and divide it by 2:
42,639,065 ÷ 2 = 21,319,532.5
If the quotient is a whole number, then 2 and 21,319,532.5 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 | 42,639,065 | |
| -1 | -42,639,065 |
Now, we try dividing 42,639,065 by 3:
42,639,065 ÷ 3 = 14,213,021.6667
If the quotient is a whole number, then 3 and 14,213,021.6667 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 | 42,639,065 | |
| -1 | -42,639,065 |
Let's try dividing by 4:
42,639,065 ÷ 4 = 10,659,766.25
If the quotient is a whole number, then 4 and 10,659,766.25 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 | 42,639,065 | |
| -1 | 42,639,065 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 79 | 245 | 395 | 553 | 2,203 | 2,765 | 3,871 | 11,015 | 15,421 | 19,355 | 77,105 | 107,947 | 174,037 | 539,735 | 870,185 | 1,218,259 | 6,091,295 | 8,527,813 | 42,639,065 |
| -1 | -5 | -7 | -35 | -49 | -79 | -245 | -395 | -553 | -2,203 | -2,765 | -3,871 | -11,015 | -15,421 | -19,355 | -77,105 | -107,947 | -174,037 | -539,735 | -870,185 | -1,218,259 | -6,091,295 | -8,527,813 | -42,639,065 |
Here are some more numbers to try:
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