A:
Positive:
1 x 2112145455 x 4224290917 x 1242438519 x 1111655585 x 248487795 x 2223311323 x 6539151615 x 130783
Negative:
-1 x -211214545-5 x -42242909-17 x -12424385-19 x -11116555-85 x -2484877-95 x -2223311-323 x -653915-1615 x -130783
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 211,214,545, 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 | 211,214,545 | |
| -1 | -211,214,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 211,214,545.
Example:
1 x 211,214,545 = 211,214,545
and
-1 x -211,214,545 = 211,214,545
Notice both answers equal 211,214,545
With that explanation out of the way, let's continue. Next, we take the number 211,214,545 and divide it by 2:
211,214,545 ÷ 2 = 105,607,272.5
If the quotient is a whole number, then 2 and 105,607,272.5 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 | 211,214,545 | |
| -1 | -211,214,545 |
Now, we try dividing 211,214,545 by 3:
211,214,545 ÷ 3 = 70,404,848.3333
If the quotient is a whole number, then 3 and 70,404,848.3333 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 | 211,214,545 | |
| -1 | -211,214,545 |
Let's try dividing by 4:
211,214,545 ÷ 4 = 52,803,636.25
If the quotient is a whole number, then 4 and 52,803,636.25 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 | 211,214,545 | |
| -1 | 211,214,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 19 | 85 | 95 | 323 | 1,615 | 130,783 | 653,915 | 2,223,311 | 2,484,877 | 11,116,555 | 12,424,385 | 42,242,909 | 211,214,545 |
| -1 | -5 | -17 | -19 | -85 | -95 | -323 | -1,615 | -130,783 | -653,915 | -2,223,311 | -2,484,877 | -11,116,555 | -12,424,385 | -42,242,909 | -211,214,545 |
Here are some more numbers to try:
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