Q: Is 21,030,400 a Composite Number?

Why is 21,030,400 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 21,030,400 can be evenly divided by 1 2 4 5 8 10 16 20 25 31 32 40 50 53 62 64 80 100 106 124 128 155 160 200 212 248 256 265 310 320 400 424 496 512 530 620 640 775 800 848 992 1,060 1,240 1,280 1,325 1,550 1,600 1,643 1,696 1,984 2,120 2,480 2,560 2,650 3,100 3,200 3,286 3,392 3,968 4,240 4,960 5,300 6,200 6,400 6,572 6,784 7,936 8,215 8,480 9,920 10,600 12,400 12,800 13,144 13,568 15,872 16,430 16,960 19,840 21,200 24,800 26,288 27,136 32,860 33,920 39,680 41,075 42,400 49,600 52,576 65,720 67,840 79,360 82,150 84,800 99,200 105,152 131,440 135,680 164,300 169,600 198,400 210,304 262,880 328,600 339,200 396,800 420,608 525,760 657,200 678,400 841,216 1,051,520 1,314,400 2,103,040 2,628,800 4,206,080 5,257,600 10,515,200 and 21,030,400, with no remainder.

Since 21,030,400 cannot be divided by just 1 and 21,030,400, 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).