Compare 1980 vs 1981

Property	1980	1981
Type	composite number	semiprime
Unique factors	4	2
Total factors	6	2
Prime factorization	2² × 3² × 5¹ × 11¹	7¹ × 283¹
Prime factorization	2 × 2 × 3 × 3 × 5 × 11	7 × 283
Divisors count	36	4
Divisors	1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980	1, 7, 283, 1981
Number of properties	0	1
Semiprimes		572nd
Roman numberals	MCMLXXX	MCMLXXXI
Base 2	11110111100₂	11110111101₂
Base 3	2201100₃	2201101₃
Base 4	132330₄	132331₄
Base 5	30410₅	30411₅
Base 6	13100₆	13101₆
Base 7	5526₇	5530₇
Base 8	3674₈	3675₈
Base 9	2640₉	2641₉
Base 10	1980₁₀	1981₁₀
Base 11	1540₁₁	1541₁₁
Base 12	1190₁₂	1191₁₂
Base 13	b94₁₃	b95₁₃
Base 14	a16₁₄	a17₁₄
Base 15	8c0₁₅	8c1₁₅
Base 16	7bc₁₆	7bd₁₆