Q: Is 21,120,288 a Composite Number?

Why is 21,120,288 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 21,120,288 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 53 56 84 96 106 112 159 168 212 224 318 336 371 424 593 636 672 742 848 1,113 1,186 1,272 1,484 1,696 1,779 2,226 2,372 2,544 2,968 3,558 4,151 4,452 4,744 5,088 5,936 7,116 8,302 8,904 9,488 11,872 12,453 14,232 16,604 17,808 18,976 24,906 28,464 31,429 33,208 35,616 49,812 56,928 62,858 66,416 94,287 99,624 125,716 132,832 188,574 199,248 220,003 251,432 377,148 398,496 440,006 502,864 660,009 754,296 880,012 1,005,728 1,320,018 1,508,592 1,760,024 2,640,036 3,017,184 3,520,048 5,280,072 7,040,096 10,560,144 and 21,120,288, with no remainder.

Since 21,120,288 cannot be divided by just 1 and 21,120,288, 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).