A:
Positive:
1 x 1235134455 x 2470268911 x 1122849555 x 224569973 x 1691965365 x 338393803 x 1538154015 x 30763
Negative:
-1 x -123513445-5 x -24702689-11 x -11228495-55 x -2245699-73 x -1691965-365 x -338393-803 x -153815-4015 x -30763
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 123,513,445, 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 | 123,513,445 | |
| -1 | -123,513,445 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,513,445.
Example:
1 x 123,513,445 = 123,513,445
and
-1 x -123,513,445 = 123,513,445
Notice both answers equal 123,513,445
With that explanation out of the way, let's continue. Next, we take the number 123,513,445 and divide it by 2:
123,513,445 ÷ 2 = 61,756,722.5
If the quotient is a whole number, then 2 and 61,756,722.5 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 | 123,513,445 | |
| -1 | -123,513,445 |
Now, we try dividing 123,513,445 by 3:
123,513,445 ÷ 3 = 41,171,148.3333
If the quotient is a whole number, then 3 and 41,171,148.3333 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 | 123,513,445 | |
| -1 | -123,513,445 |
Let's try dividing by 4:
123,513,445 ÷ 4 = 30,878,361.25
If the quotient is a whole number, then 4 and 30,878,361.25 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 | 123,513,445 | |
| -1 | 123,513,445 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 73 | 365 | 803 | 4,015 | 30,763 | 153,815 | 338,393 | 1,691,965 | 2,245,699 | 11,228,495 | 24,702,689 | 123,513,445 |
| -1 | -5 | -11 | -55 | -73 | -365 | -803 | -4,015 | -30,763 | -153,815 | -338,393 | -1,691,965 | -2,245,699 | -11,228,495 | -24,702,689 | -123,513,445 |
Here are some more numbers to try:
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