81180920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{479}}^1$

素因数の和:732

約数の個数: 64

約数和(自身を含む): 193536000

約数和(自身を除く): 112355080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 223, 380, 446, 479, 760, 892, 958, 1115, 1784, 1916, 2230, 2395, 3832, 4237, 4460, 4790, 8474, 8920, 9101, 9580, 16948, 18202, 19160, 21185, 33896, 36404, 42370, 45505, 72808, 84740, 91010, 106817, 169480, 182020, 213634, 364040, 427268, 534085, 854536, 1068170, 2029523, 2136340, 4059046, 4272680, 8118092, 10147615, 16236184, 20295230, 40590460, 81180920]

約数ペア:

[(1, 81180920), (2, 40590460), (4, 20295230), (5, 16236184), (8, 10147615), (10, 8118092), (19, 4272680), (20, 4059046), (38, 2136340), (40, 2029523), (76, 1068170), (95, 854536), (152, 534085), (190, 427268), (223, 364040), (380, 213634), (446, 182020), (479, 169480), (760, 106817), (892, 91010), (958, 84740), (1115, 72808), (1784, 45505), (1916, 42370), (2230, 36404), (2395, 33896), (3832, 21185), (4237, 19160), (4460, 18202), (4790, 16948), (8474, 9580), (8920, 9101)]