A:
Positive:
1 x 2451434055 x 4902868113 x 1885718565 x 377143783 x 2953535415 x 5907071079 x 2271955395 x 45439
Negative:
-1 x -245143405-5 x -49028681-13 x -18857185-65 x -3771437-83 x -2953535-415 x -590707-1079 x -227195-5395 x -45439
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 245,143,405, 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 | 245,143,405 | |
| -1 | -245,143,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 245,143,405.
Example:
1 x 245,143,405 = 245,143,405
and
-1 x -245,143,405 = 245,143,405
Notice both answers equal 245,143,405
With that explanation out of the way, let's continue. Next, we take the number 245,143,405 and divide it by 2:
245,143,405 ÷ 2 = 122,571,702.5
If the quotient is a whole number, then 2 and 122,571,702.5 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 | 245,143,405 | |
| -1 | -245,143,405 |
Now, we try dividing 245,143,405 by 3:
245,143,405 ÷ 3 = 81,714,468.3333
If the quotient is a whole number, then 3 and 81,714,468.3333 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 | 245,143,405 | |
| -1 | -245,143,405 |
Let's try dividing by 4:
245,143,405 ÷ 4 = 61,285,851.25
If the quotient is a whole number, then 4 and 61,285,851.25 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 | 245,143,405 | |
| -1 | 245,143,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 83 | 415 | 1,079 | 5,395 | 45,439 | 227,195 | 590,707 | 2,953,535 | 3,771,437 | 18,857,185 | 49,028,681 | 245,143,405 |
| -1 | -5 | -13 | -65 | -83 | -415 | -1,079 | -5,395 | -45,439 | -227,195 | -590,707 | -2,953,535 | -3,771,437 | -18,857,185 | -49,028,681 | -245,143,405 |
Here are some more numbers to try:
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