A:
Positive:
1 x 2541031455 x 5082062973 x 3480865163 x 1558915365 x 696173815 x 3117834271 x 5949511899 x 21355
Negative:
-1 x -254103145-5 x -50820629-73 x -3480865-163 x -1558915-365 x -696173-815 x -311783-4271 x -59495-11899 x -21355
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 254,103,145, 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 | 254,103,145 | |
| -1 | -254,103,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 254,103,145.
Example:
1 x 254,103,145 = 254,103,145
and
-1 x -254,103,145 = 254,103,145
Notice both answers equal 254,103,145
With that explanation out of the way, let's continue. Next, we take the number 254,103,145 and divide it by 2:
254,103,145 ÷ 2 = 127,051,572.5
If the quotient is a whole number, then 2 and 127,051,572.5 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 | 254,103,145 | |
| -1 | -254,103,145 |
Now, we try dividing 254,103,145 by 3:
254,103,145 ÷ 3 = 84,701,048.3333
If the quotient is a whole number, then 3 and 84,701,048.3333 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 | 254,103,145 | |
| -1 | -254,103,145 |
Let's try dividing by 4:
254,103,145 ÷ 4 = 63,525,786.25
If the quotient is a whole number, then 4 and 63,525,786.25 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 | 254,103,145 | |
| -1 | 254,103,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 73 | 163 | 365 | 815 | 4,271 | 11,899 | 21,355 | 59,495 | 311,783 | 696,173 | 1,558,915 | 3,480,865 | 50,820,629 | 254,103,145 |
| -1 | -5 | -73 | -163 | -365 | -815 | -4,271 | -11,899 | -21,355 | -59,495 | -311,783 | -696,173 | -1,558,915 | -3,480,865 | -50,820,629 | -254,103,145 |
Here are some more numbers to try:
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