User:Incnis Mrsi/21

← 20 22 → 21
↑ Multiples:	¦¦ 42	¦¦¦ 63	¦¦¦¦¦ 105	¦¦¦¦¦¦¦      147
↓ Fractions:		7		3
← 20 21 22 23 24 25 26 27 28 29 → List of numbers Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal		twenty-one
Ordinal		21st (twenty-first)
Factorization		$3\cdot 7$
Divisors		1, 3, 7, 21
Roman numeral		XXI
Binary		101012
Octal		258
Duodecimal		1912
Hexadecimal		1516

Multiples ×	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	specific
… of 1:	▪	▪	▪		▪					▪	▪									▪	▪
… of 3:	▪		▪			▪
… of 7:		▪