Q: Is 21,351,040 a Composite Number?

Why is 21,351,040 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 21,351,040 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 73 80 128 146 160 292 320 365 457 584 640 730 914 1,168 1,460 1,828 2,285 2,336 2,920 3,656 4,570 4,672 5,840 7,312 9,140 9,344 11,680 14,624 18,280 23,360 29,248 33,361 36,560 46,720 58,496 66,722 73,120 133,444 146,240 166,805 266,888 292,480 333,610 533,776 667,220 1,067,552 1,334,440 2,135,104 2,668,880 4,270,208 5,337,760 10,675,520 and 21,351,040, with no remainder.

Since 21,351,040 cannot be divided by just 1 and 21,351,040, 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).