A:
Positive:
1 x 2451251537 x 3501787913 x 1885578131 x 790726391 x 2693683217 x 1129609403 x 608251961 x 2550732803 x 874512821 x 868936727 x 3643912493 x 19621
Negative:
-1 x -245125153-7 x -35017879-13 x -18855781-31 x -7907263-91 x -2693683-217 x -1129609-403 x -608251-961 x -255073-2803 x -87451-2821 x -86893-6727 x -36439-12493 x -19621
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 245,125,153, 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 | 245,125,153 | |
| -1 | -245,125,153 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 245,125,153.
Example:
1 x 245,125,153 = 245,125,153
and
-1 x -245,125,153 = 245,125,153
Notice both answers equal 245,125,153
With that explanation out of the way, let's continue. Next, we take the number 245,125,153 and divide it by 2:
245,125,153 ÷ 2 = 122,562,576.5
If the quotient is a whole number, then 2 and 122,562,576.5 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 | 245,125,153 | |
| -1 | -245,125,153 |
Now, we try dividing 245,125,153 by 3:
245,125,153 ÷ 3 = 81,708,384.3333
If the quotient is a whole number, then 3 and 81,708,384.3333 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 | 245,125,153 | |
| -1 | -245,125,153 |
Let's try dividing by 4:
245,125,153 ÷ 4 = 61,281,288.25
If the quotient is a whole number, then 4 and 61,281,288.25 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 | 245,125,153 | |
| -1 | 245,125,153 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 31 | 91 | 217 | 403 | 961 | 2,803 | 2,821 | 6,727 | 12,493 | 19,621 | 36,439 | 86,893 | 87,451 | 255,073 | 608,251 | 1,129,609 | 2,693,683 | 7,907,263 | 18,855,781 | 35,017,879 | 245,125,153 |
| -1 | -7 | -13 | -31 | -91 | -217 | -403 | -961 | -2,803 | -2,821 | -6,727 | -12,493 | -19,621 | -36,439 | -86,893 | -87,451 | -255,073 | -608,251 | -1,129,609 | -2,693,683 | -7,907,263 | -18,855,781 | -35,017,879 | -245,125,153 |
Here are some more numbers to try:
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