Q: Is 21,056,672 a Composite Number?

Why is 21,056,672 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 21,056,672 can be evenly divided by 1 2 4 7 8 13 14 16 26 28 32 49 52 56 91 98 104 112 182 196 208 224 364 392 416 637 728 784 1,033 1,274 1,456 1,568 2,066 2,548 2,912 4,132 5,096 7,231 8,264 10,192 13,429 14,462 16,528 20,384 26,858 28,924 33,056 50,617 53,716 57,848 94,003 101,234 107,432 115,696 188,006 202,468 214,864 231,392 376,012 404,936 429,728 658,021 752,024 809,872 1,316,042 1,504,048 1,619,744 2,632,084 3,008,096 5,264,168 10,528,336 and 21,056,672, with no remainder.

Since 21,056,672 cannot be divided by just 1 and 21,056,672, 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).