A:
Positive:
1 x 3811788897 x 5445412713 x 2932145349 x 777916191 x 4188779179 x 2129491637 x 5983971253 x 3042132327 x 1638073343 x 1140238771 x 4345916289 x 23401
Negative:
-1 x -381178889-7 x -54454127-13 x -29321453-49 x -7779161-91 x -4188779-179 x -2129491-637 x -598397-1253 x -304213-2327 x -163807-3343 x -114023-8771 x -43459-16289 x -23401
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 381,178,889, 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 | 381,178,889 | |
| -1 | -381,178,889 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 381,178,889.
Example:
1 x 381,178,889 = 381,178,889
and
-1 x -381,178,889 = 381,178,889
Notice both answers equal 381,178,889
With that explanation out of the way, let's continue. Next, we take the number 381,178,889 and divide it by 2:
381,178,889 ÷ 2 = 190,589,444.5
If the quotient is a whole number, then 2 and 190,589,444.5 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 | 381,178,889 | |
| -1 | -381,178,889 |
Now, we try dividing 381,178,889 by 3:
381,178,889 ÷ 3 = 127,059,629.6667
If the quotient is a whole number, then 3 and 127,059,629.6667 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 | 381,178,889 | |
| -1 | -381,178,889 |
Let's try dividing by 4:
381,178,889 ÷ 4 = 95,294,722.25
If the quotient is a whole number, then 4 and 95,294,722.25 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 | 381,178,889 | |
| -1 | 381,178,889 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 49 | 91 | 179 | 637 | 1,253 | 2,327 | 3,343 | 8,771 | 16,289 | 23,401 | 43,459 | 114,023 | 163,807 | 304,213 | 598,397 | 2,129,491 | 4,188,779 | 7,779,161 | 29,321,453 | 54,454,127 | 381,178,889 |
| -1 | -7 | -13 | -49 | -91 | -179 | -637 | -1,253 | -2,327 | -3,343 | -8,771 | -16,289 | -23,401 | -43,459 | -114,023 | -163,807 | -304,213 | -598,397 | -2,129,491 | -4,188,779 | -7,779,161 | -29,321,453 | -54,454,127 | -381,178,889 |
Here are some more numbers to try:
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