A:
Positive:
1 x 2198513655 x 4397027323 x 9558755109 x 2016985115 x 1911751545 x 4033972507 x 8769512535 x 17539
Negative:
-1 x -219851365-5 x -43970273-23 x -9558755-109 x -2016985-115 x -1911751-545 x -403397-2507 x -87695-12535 x -17539
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 219,851,365, 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 | 219,851,365 | |
| -1 | -219,851,365 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 219,851,365.
Example:
1 x 219,851,365 = 219,851,365
and
-1 x -219,851,365 = 219,851,365
Notice both answers equal 219,851,365
With that explanation out of the way, let's continue. Next, we take the number 219,851,365 and divide it by 2:
219,851,365 ÷ 2 = 109,925,682.5
If the quotient is a whole number, then 2 and 109,925,682.5 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 | 219,851,365 | |
| -1 | -219,851,365 |
Now, we try dividing 219,851,365 by 3:
219,851,365 ÷ 3 = 73,283,788.3333
If the quotient is a whole number, then 3 and 73,283,788.3333 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 | 219,851,365 | |
| -1 | -219,851,365 |
Let's try dividing by 4:
219,851,365 ÷ 4 = 54,962,841.25
If the quotient is a whole number, then 4 and 54,962,841.25 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 | 219,851,365 | |
| -1 | 219,851,365 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 109 | 115 | 545 | 2,507 | 12,535 | 17,539 | 87,695 | 403,397 | 1,911,751 | 2,016,985 | 9,558,755 | 43,970,273 | 219,851,365 |
| -1 | -5 | -23 | -109 | -115 | -545 | -2,507 | -12,535 | -17,539 | -87,695 | -403,397 | -1,911,751 | -2,016,985 | -9,558,755 | -43,970,273 | -219,851,365 |
Here are some more numbers to try:
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