Compare 1909 vs 1920

Property	1909	1920
Type	semiprime	composite number
Unique factors	2	3
Total factors	2	9
Prime factorization	23¹ × 83¹	2⁷ × 3¹ × 5¹
Prime factorization	23 × 83	2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5
Divisors count	4	32
Divisors	1, 23, 83, 1909	1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 320, 384, 480, 640, 960, 1920
Number of properties	1	0
Semiprimes	549th
Roman numberals	MCMIX	MCMXX
Base 2	11101110101₂	11110000000₂
Base 3	2121201₃	2122010₃
Base 4	131311₄	132000₄
Base 5	30114₅	30140₅
Base 6	12501₆	12520₆
Base 7	5365₇	5412₇
Base 8	3565₈	3600₈
Base 9	2551₉	2563₉
Base 10	1909₁₀	1920₁₀
Base 11	1486₁₁	1496₁₁
Base 12	1131₁₂	1140₁₂
Base 13	b3b₁₃	b49₁₃
Base 14	9a5₁₄	9b2₁₄
Base 15	874₁₅	880₁₅
Base 16	775₁₆	780₁₆