Q: Is 21,415,280 a Composite Number?

Why is 21,415,280 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 21,415,280 can be evenly divided by 1 2 4 5 8 10 16 19 20 38 40 73 76 80 95 146 152 190 193 292 304 365 380 386 584 730 760 772 965 1,168 1,387 1,460 1,520 1,544 1,930 2,774 2,920 3,088 3,667 3,860 5,548 5,840 6,935 7,334 7,720 11,096 13,870 14,089 14,668 15,440 18,335 22,192 27,740 28,178 29,336 36,670 55,480 56,356 58,672 70,445 73,340 110,960 112,712 140,890 146,680 225,424 267,691 281,780 293,360 535,382 563,560 1,070,764 1,127,120 1,338,455 2,141,528 2,676,910 4,283,056 5,353,820 10,707,640 and 21,415,280, with no remainder.

Since 21,415,280 cannot be divided by just 1 and 21,415,280, 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).