18028720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{409}}^1$

素因数の和:470

約数の個数: 80

約数和(自身を含む): 45756000

約数和(自身を除く): 27727280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 38, 40, 58, 76, 80, 95, 116, 145, 152, 190, 232, 290, 304, 380, 409, 464, 551, 580, 760, 818, 1102, 1160, 1520, 1636, 2045, 2204, 2320, 2755, 3272, 4090, 4408, 5510, 6544, 7771, 8180, 8816, 11020, 11861, 15542, 16360, 22040, 23722, 31084, 32720, 38855, 44080, 47444, 59305, 62168, 77710, 94888, 118610, 124336, 155420, 189776, 225359, 237220, 310840, 450718, 474440, 621680, 901436, 948880, 1126795, 1802872, 2253590, 3605744, 4507180, 9014360, 18028720]

約数ペア:

[(1, 18028720), (2, 9014360), (4, 4507180), (5, 3605744), (8, 2253590), (10, 1802872), (16, 1126795), (19, 948880), (20, 901436), (29, 621680), (38, 474440), (40, 450718), (58, 310840), (76, 237220), (80, 225359), (95, 189776), (116, 155420), (145, 124336), (152, 118610), (190, 94888), (232, 77710), (290, 62168), (304, 59305), (380, 47444), (409, 44080), (464, 38855), (551, 32720), (580, 31084), (760, 23722), (818, 22040), (1102, 16360), (1160, 15542), (1520, 11861), (1636, 11020), (2045, 8816), (2204, 8180), (2320, 7771), (2755, 6544), (3272, 5510), (4090, 4408)]