A:
Positive:
1 x 1032202155 x 206440437 x 1474574535 x 294914949 x 210653579 x 1306585245 x 421307395 x 261317553 x 1866552765 x 373313871 x 266655333 x 19355
Negative:
-1 x -103220215-5 x -20644043-7 x -14745745-35 x -2949149-49 x -2106535-79 x -1306585-245 x -421307-395 x -261317-553 x -186655-2765 x -37331-3871 x -26665-5333 x -19355
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 103,220,215, 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 | 103,220,215 | |
| -1 | -103,220,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 103,220,215.
Example:
1 x 103,220,215 = 103,220,215
and
-1 x -103,220,215 = 103,220,215
Notice both answers equal 103,220,215
With that explanation out of the way, let's continue. Next, we take the number 103,220,215 and divide it by 2:
103,220,215 ÷ 2 = 51,610,107.5
If the quotient is a whole number, then 2 and 51,610,107.5 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 | 103,220,215 | |
| -1 | -103,220,215 |
Now, we try dividing 103,220,215 by 3:
103,220,215 ÷ 3 = 34,406,738.3333
If the quotient is a whole number, then 3 and 34,406,738.3333 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 | 103,220,215 | |
| -1 | -103,220,215 |
Let's try dividing by 4:
103,220,215 ÷ 4 = 25,805,053.75
If the quotient is a whole number, then 4 and 25,805,053.75 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 | 103,220,215 | |
| -1 | 103,220,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 79 | 245 | 395 | 553 | 2,765 | 3,871 | 5,333 | 19,355 | 26,665 | 37,331 | 186,655 | 261,317 | 421,307 | 1,306,585 | 2,106,535 | 2,949,149 | 14,745,745 | 20,644,043 | 103,220,215 |
| -1 | -5 | -7 | -35 | -49 | -79 | -245 | -395 | -553 | -2,765 | -3,871 | -5,333 | -19,355 | -26,665 | -37,331 | -186,655 | -261,317 | -421,307 | -1,306,585 | -2,106,535 | -2,949,149 | -14,745,745 | -20,644,043 | -103,220,215 |
Here are some more numbers to try:
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