A:
Positive:
1 x 15541741717 x 914220123 x 675727983 x 1872499391 x 3974871411 x 1101471909 x 814134789 x 32453
Negative:
-1 x -155417417-17 x -9142201-23 x -6757279-83 x -1872499-391 x -397487-1411 x -110147-1909 x -81413-4789 x -32453
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 155,417,417, 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 | 155,417,417 | |
| -1 | -155,417,417 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,417,417.
Example:
1 x 155,417,417 = 155,417,417
and
-1 x -155,417,417 = 155,417,417
Notice both answers equal 155,417,417
With that explanation out of the way, let's continue. Next, we take the number 155,417,417 and divide it by 2:
155,417,417 ÷ 2 = 77,708,708.5
If the quotient is a whole number, then 2 and 77,708,708.5 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 | 155,417,417 | |
| -1 | -155,417,417 |
Now, we try dividing 155,417,417 by 3:
155,417,417 ÷ 3 = 51,805,805.6667
If the quotient is a whole number, then 3 and 51,805,805.6667 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 | 155,417,417 | |
| -1 | -155,417,417 |
Let's try dividing by 4:
155,417,417 ÷ 4 = 38,854,354.25
If the quotient is a whole number, then 4 and 38,854,354.25 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 | 155,417,417 | |
| -1 | 155,417,417 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 83 | 391 | 1,411 | 1,909 | 4,789 | 32,453 | 81,413 | 110,147 | 397,487 | 1,872,499 | 6,757,279 | 9,142,201 | 155,417,417 |
| -1 | -17 | -23 | -83 | -391 | -1,411 | -1,909 | -4,789 | -32,453 | -81,413 | -110,147 | -397,487 | -1,872,499 | -6,757,279 | -9,142,201 | -155,417,417 |
Here are some more numbers to try:
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