A:
Positive:
1 x 1682579155 x 336515837 x 2403684535 x 480736949 x 3433835245 x 686767359 x 4686851795 x 937371913 x 879552513 x 669559565 x 1759112565 x 13391
Negative:
-1 x -168257915-5 x -33651583-7 x -24036845-35 x -4807369-49 x -3433835-245 x -686767-359 x -468685-1795 x -93737-1913 x -87955-2513 x -66955-9565 x -17591-12565 x -13391
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 168,257,915, 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 | 168,257,915 | |
| -1 | -168,257,915 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 168,257,915.
Example:
1 x 168,257,915 = 168,257,915
and
-1 x -168,257,915 = 168,257,915
Notice both answers equal 168,257,915
With that explanation out of the way, let's continue. Next, we take the number 168,257,915 and divide it by 2:
168,257,915 ÷ 2 = 84,128,957.5
If the quotient is a whole number, then 2 and 84,128,957.5 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 | 168,257,915 | |
| -1 | -168,257,915 |
Now, we try dividing 168,257,915 by 3:
168,257,915 ÷ 3 = 56,085,971.6667
If the quotient is a whole number, then 3 and 56,085,971.6667 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 | 168,257,915 | |
| -1 | -168,257,915 |
Let's try dividing by 4:
168,257,915 ÷ 4 = 42,064,478.75
If the quotient is a whole number, then 4 and 42,064,478.75 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 | 168,257,915 | |
| -1 | 168,257,915 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 245 | 359 | 1,795 | 1,913 | 2,513 | 9,565 | 12,565 | 13,391 | 17,591 | 66,955 | 87,955 | 93,737 | 468,685 | 686,767 | 3,433,835 | 4,807,369 | 24,036,845 | 33,651,583 | 168,257,915 |
| -1 | -5 | -7 | -35 | -49 | -245 | -359 | -1,795 | -1,913 | -2,513 | -9,565 | -12,565 | -13,391 | -17,591 | -66,955 | -87,955 | -93,737 | -468,685 | -686,767 | -3,433,835 | -4,807,369 | -24,036,845 | -33,651,583 | -168,257,915 |
Here are some more numbers to try:
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