A:
Positive:
1 x 2106541577 x 3009345117 x 12391421119 x 1770203131 x 1608047917 x 2297212227 x 9459113513 x 15589
Negative:
-1 x -210654157-7 x -30093451-17 x -12391421-119 x -1770203-131 x -1608047-917 x -229721-2227 x -94591-13513 x -15589
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 210,654,157, 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 | 210,654,157 | |
| -1 | -210,654,157 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 210,654,157.
Example:
1 x 210,654,157 = 210,654,157
and
-1 x -210,654,157 = 210,654,157
Notice both answers equal 210,654,157
With that explanation out of the way, let's continue. Next, we take the number 210,654,157 and divide it by 2:
210,654,157 ÷ 2 = 105,327,078.5
If the quotient is a whole number, then 2 and 105,327,078.5 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 | 210,654,157 | |
| -1 | -210,654,157 |
Now, we try dividing 210,654,157 by 3:
210,654,157 ÷ 3 = 70,218,052.3333
If the quotient is a whole number, then 3 and 70,218,052.3333 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 | 210,654,157 | |
| -1 | -210,654,157 |
Let's try dividing by 4:
210,654,157 ÷ 4 = 52,663,539.25
If the quotient is a whole number, then 4 and 52,663,539.25 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 | 210,654,157 | |
| -1 | 210,654,157 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 131 | 917 | 2,227 | 13,513 | 15,589 | 94,591 | 229,721 | 1,608,047 | 1,770,203 | 12,391,421 | 30,093,451 | 210,654,157 |
| -1 | -7 | -17 | -119 | -131 | -917 | -2,227 | -13,513 | -15,589 | -94,591 | -229,721 | -1,608,047 | -1,770,203 | -12,391,421 | -30,093,451 | -210,654,157 |
Here are some more numbers to try:
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