Q: Is 21,280 a Composite Number?

 A: Yes, 21,280 is a composite number.

Why is 21,280 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 21,280 can be evenly divided by 1 2 4 5 7 8 10 14 16 19 20 28 32 35 38 40 56 70 76 80 95 112 133 140 152 160 190 224 266 280 304 380 532 560 608 665 760 1,064 1,120 1,330 1,520 2,128 2,660 3,040 4,256 5,320 10,640 and 21,280, with no remainder.

Since 21,280 cannot be divided by just 1 and 21,280, it is a composite number.


More Examples

Number 21,27821,27921,28121,282
Composite? yesyesyesyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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