A:
Positive:
1 x 1685245155 x 3370490373 x 2308555365 x 461711397 x 4244951163 x 1449051985 x 848995815 x 28981
Negative:
-1 x -168524515-5 x -33704903-73 x -2308555-365 x -461711-397 x -424495-1163 x -144905-1985 x -84899-5815 x -28981
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 168,524,515, 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 | 168,524,515 | |
| -1 | -168,524,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 168,524,515.
Example:
1 x 168,524,515 = 168,524,515
and
-1 x -168,524,515 = 168,524,515
Notice both answers equal 168,524,515
With that explanation out of the way, let's continue. Next, we take the number 168,524,515 and divide it by 2:
168,524,515 ÷ 2 = 84,262,257.5
If the quotient is a whole number, then 2 and 84,262,257.5 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 | 168,524,515 | |
| -1 | -168,524,515 |
Now, we try dividing 168,524,515 by 3:
168,524,515 ÷ 3 = 56,174,838.3333
If the quotient is a whole number, then 3 and 56,174,838.3333 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 | 168,524,515 | |
| -1 | -168,524,515 |
Let's try dividing by 4:
168,524,515 ÷ 4 = 42,131,128.75
If the quotient is a whole number, then 4 and 42,131,128.75 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 | 168,524,515 | |
| -1 | 168,524,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 73 | 365 | 397 | 1,163 | 1,985 | 5,815 | 28,981 | 84,899 | 144,905 | 424,495 | 461,711 | 2,308,555 | 33,704,903 | 168,524,515 |
| -1 | -5 | -73 | -365 | -397 | -1,163 | -1,985 | -5,815 | -28,981 | -84,899 | -144,905 | -424,495 | -461,711 | -2,308,555 | -33,704,903 | -168,524,515 |
Here are some more numbers to try:
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