A:
Positive:
1 x 21674747913 x 1667288329 x 747405167 x 3235037377 x 574927871 x 2488491943 x 1115538581 x 25259
Negative:
-1 x -216747479-13 x -16672883-29 x -7474051-67 x -3235037-377 x -574927-871 x -248849-1943 x -111553-8581 x -25259
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 216,747,479, 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 | 216,747,479 | |
| -1 | -216,747,479 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 216,747,479.
Example:
1 x 216,747,479 = 216,747,479
and
-1 x -216,747,479 = 216,747,479
Notice both answers equal 216,747,479
With that explanation out of the way, let's continue. Next, we take the number 216,747,479 and divide it by 2:
216,747,479 ÷ 2 = 108,373,739.5
If the quotient is a whole number, then 2 and 108,373,739.5 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 | 216,747,479 | |
| -1 | -216,747,479 |
Now, we try dividing 216,747,479 by 3:
216,747,479 ÷ 3 = 72,249,159.6667
If the quotient is a whole number, then 3 and 72,249,159.6667 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 | 216,747,479 | |
| -1 | -216,747,479 |
Let's try dividing by 4:
216,747,479 ÷ 4 = 54,186,869.75
If the quotient is a whole number, then 4 and 54,186,869.75 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 | 216,747,479 | |
| -1 | 216,747,479 |
If you did it right, you will end up with this table:
| 1 | 13 | 29 | 67 | 377 | 871 | 1,943 | 8,581 | 25,259 | 111,553 | 248,849 | 574,927 | 3,235,037 | 7,474,051 | 16,672,883 | 216,747,479 |
| -1 | -13 | -29 | -67 | -377 | -871 | -1,943 | -8,581 | -25,259 | -111,553 | -248,849 | -574,927 | -3,235,037 | -7,474,051 | -16,672,883 | -216,747,479 |
Here are some more numbers to try:
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