Q: Is 21,133,040 a Composite Number?

Why is 21,133,040 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,133,040 can be evenly divided by 1 2 4 5 8 10 16 17 20 34 40 41 68 80 82 85 136 164 170 205 272 328 340 379 410 656 680 697 758 820 1,360 1,394 1,516 1,640 1,895 2,788 3,032 3,280 3,485 3,790 5,576 6,064 6,443 6,970 7,580 11,152 12,886 13,940 15,160 15,539 25,772 27,880 30,320 31,078 32,215 51,544 55,760 62,156 64,430 77,695 103,088 124,312 128,860 155,390 248,624 257,720 264,163 310,780 515,440 528,326 621,560 1,056,652 1,243,120 1,320,815 2,113,304 2,641,630 4,226,608 5,283,260 10,566,520 and 21,133,040, with no remainder.

Since 21,133,040 cannot be divided by just 1 and 21,133,040, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).