Q: What are the factor combinations of the number 21,135,216?

 A:
Positive:   1 x 211352162 x 105676083 x 70450724 x 52838046 x 35225368 x 264190212 x 176126816 x 132095117 x 124324824 x 88063434 x 62162448 x 44031751 x 41441659 x 35822468 x 310812102 x 207208118 x 179112136 x 155406177 x 119408204 x 103604236 x 89556272 x 77703354 x 59704408 x 51802439 x 48144472 x 44778708 x 29852816 x 25901878 x 24072944 x 223891003 x 210721317 x 160481416 x 149261756 x 120362006 x 105362634 x 80242832 x 74633009 x 70243512 x 60184012 x 5268
Negative: -1 x -21135216-2 x -10567608-3 x -7045072-4 x -5283804-6 x -3522536-8 x -2641902-12 x -1761268-16 x -1320951-17 x -1243248-24 x -880634-34 x -621624-48 x -440317-51 x -414416-59 x -358224-68 x -310812-102 x -207208-118 x -179112-136 x -155406-177 x -119408-204 x -103604-236 x -89556-272 x -77703-354 x -59704-408 x -51802-439 x -48144-472 x -44778-708 x -29852-816 x -25901-878 x -24072-944 x -22389-1003 x -21072-1317 x -16048-1416 x -14926-1756 x -12036-2006 x -10536-2634 x -8024-2832 x -7463-3009 x -7024-3512 x -6018-4012 x -5268


How do I find the factor combinations of the number 21,135,216?

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 21,135,216, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

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 21,135,216
-1 -21,135,216

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,135,216.

Example:
1 x 21,135,216 = 21,135,216
and
-1 x -21,135,216 = 21,135,216
Notice both answers equal 21,135,216

With that explanation out of the way, let's continue. Next, we take the number 21,135,216 and divide it by 2:

21,135,216 ÷ 2 = 10,567,608

If the quotient is a whole number, then 2 and 10,567,608 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 10,567,608 21,135,216
-1 -2 -10,567,608 -21,135,216

Now, we try dividing 21,135,216 by 3:

21,135,216 ÷ 3 = 7,045,072

If the quotient is a whole number, then 3 and 7,045,072 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 3 7,045,072 10,567,608 21,135,216
-1 -2 -3 -7,045,072 -10,567,608 -21,135,216

Let's try dividing by 4:

21,135,216 ÷ 4 = 5,283,804

If the quotient is a whole number, then 4 and 5,283,804 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 3 4 5,283,804 7,045,072 10,567,608 21,135,216
-1 -2 -3 -4 -5,283,804 -7,045,072 -10,567,608 21,135,216
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

1234681216172434485159681021181361772042362723544084394727088168789441,0031,3171,4161,7562,0062,6342,8323,0093,5124,0125,2686,0187,0247,4638,02410,53612,03614,92616,04821,07222,38924,07225,90129,85244,77848,14451,80259,70477,70389,556103,604119,408155,406179,112207,208310,812358,224414,416440,317621,624880,6341,243,2481,320,9511,761,2682,641,9023,522,5365,283,8047,045,07210,567,60821,135,216
-1-2-3-4-6-8-12-16-17-24-34-48-51-59-68-102-118-136-177-204-236-272-354-408-439-472-708-816-878-944-1,003-1,317-1,416-1,756-2,006-2,634-2,832-3,009-3,512-4,012-5,268-6,018-7,024-7,463-8,024-10,536-12,036-14,926-16,048-21,072-22,389-24,072-25,901-29,852-44,778-48,144-51,802-59,704-77,703-89,556-103,604-119,408-155,406-179,112-207,208-310,812-358,224-414,416-440,317-621,624-880,634-1,243,248-1,320,951-1,761,268-2,641,902-3,522,536-5,283,804-7,045,072-10,567,608-21,135,216

More Examples

Here are some more numbers to try:

21,135,21421,135,21521,135,21721,135,218
Try the factor calculator

Explore more about the number 21,135,216:


Ask a Question