Q: Is 21,017,220 a Composite Number?

Why is 21,017,220 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 21,017,220 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 84 105 140 163 210 307 326 420 489 614 652 815 921 978 1,141 1,228 1,535 1,630 1,842 1,956 2,149 2,282 2,445 3,070 3,260 3,423 3,684 4,298 4,564 4,605 4,890 5,705 6,140 6,447 6,846 8,596 9,210 9,780 10,745 11,410 12,894 13,692 17,115 18,420 21,490 22,820 25,788 32,235 34,230 42,980 50,041 64,470 68,460 100,082 128,940 150,123 200,164 250,205 300,246 350,287 500,410 600,492 700,574 750,615 1,000,820 1,050,861 1,401,148 1,501,230 1,751,435 2,101,722 3,002,460 3,502,870 4,203,444 5,254,305 7,005,740 10,508,610 and 21,017,220, with no remainder.

Since 21,017,220 cannot be divided by just 1 and 21,017,220, 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).