Compare 31980 vs 31991

Property	31980	31991
Type	composite number	prime
Unique factors	5	1
Total factors	6	1
Prime factorization	2² × 3¹ × 5¹ × 13¹ × 41¹	31991¹
Prime factorization	2 × 2 × 3 × 5 × 13 × 41	31991
Divisors count	48	2
Divisors	1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 41, 52, 60, 65, 78, 82, 123, 130, 156, 164, 195, 205, 246, 260, 390, 410, 492, 533, 615, 780, 820, 1066, 1230, 1599, 2132, 2460, 2665, 3198, 5330, 6396, 7995, 10660, 15990, 31980	1, 31991
Number of properties	0	5
Additive primes		1554th
Emirps		698th
Isolated primes		2451st
Primes		3432nd
Ulam primes		263rd
Roman numberals
Base 2	111110011101100₂	111110011110111₂
Base 3	1121212110₃	1121212212₃
Base 4	13303230₄	13303313₄
Base 5	2010410₅	2010431₅
Base 6	404020₆	404035₆
Base 7	162144₇	162161₇
Base 8	76354₈	76367₈
Base 9	47773₉	47785₉
Base 10	31980₁₀	31991₁₀
Base 11	22033₁₁	22043₁₁
Base 12	16610₁₂	1661b₁₂
Base 13	11730₁₃	1173b₁₃
Base 14	b924₁₄	b931₁₄
Base 15	9720₁₅	972b₁₅
Base 16	7cec₁₆	7cf7₁₆