640497780

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1789}}^1$

素因数の和:1840

約数の個数: 240

約数和(自身を含む): 2292388560

約数和(自身を除く): 1651890780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 17, 18, 20, 26, 27, 30, 34, 36, 39, 45, 51, 52, 54, 60, 65, 68, 78, 81, 85, 90, 102, 108, 117, 130, 135, 153, 156, 162, 170, 180, 195, 204, 221, 234, 255, 260, 270, 306, 324, 340, 351, 390, 405, 442, 459, 468, 510, 540, 585, 612, 663, 702, 765, 780, 810, 884, 918, 1020, 1053, 1105, 1170, 1326, 1377, 1404, 1530, 1620, 1755, 1789, 1836, 1989, 2106, 2210, 2295, 2340, 2652, 2754, 3060, 3315, 3510, 3578, 3978, 4212, 4420, 4590, 5265, 5367, 5508, 5967, 6630, 6885, 7020, 7156, 7956, 8945, 9180, 9945, 10530, 10734, 11934, 13260, 13770, 16101, 17890, 17901, 19890, 21060, 21468, 23257, 23868, 26835, 27540, 29835, 30413, 32202, 35780, 35802, 39780, 46514, 48303, 53670, 59670, 60826, 64404, 69771, 71604, 80505, 89505, 91239, 93028, 96606, 107340, 116285, 119340, 121652, 139542, 144909, 152065, 161010, 179010, 182478, 193212, 209313, 232570, 241515, 273717, 279084, 289818, 304130, 322020, 348855, 358020, 364956, 395369, 418626, 456195, 465140, 483030, 547434, 579636, 608260, 627939, 697710, 724545, 790738, 821151, 837252, 912390, 966060, 1046565, 1094868, 1186107, 1255878, 1368585, 1395420, 1449090, 1581476, 1642302, 1824780, 1883817, 1976845, 2093130, 2372214, 2463453, 2511756, 2737170, 2898180, 3139695, 3284604, 3558321, 3767634, 3953690, 4105755, 4186260, 4744428, 4926906, 5474340, 5930535, 6279390, 7116642, 7535268, 7907380, 8211510, 9419085, 9853812, 10674963, 11861070, 12317265, 12558780, 14233284, 16423020, 17791605, 18838170, 21349926, 23722140, 24634530, 32024889, 35583210, 37676340, 42699852, 49269060, 53374815, 64049778, 71166420, 106749630, 128099556, 160124445, 213499260, 320248890, 640497780]

約数ペア:

[(1, 640497780), (2, 320248890), (3, 213499260), (4, 160124445), (5, 128099556), (6, 106749630), (9, 71166420), (10, 64049778), (12, 53374815), (13, 49269060), (15, 42699852), (17, 37676340), (18, 35583210), (20, 32024889), (26, 24634530), (27, 23722140), (30, 21349926), (34, 18838170), (36, 17791605), (39, 16423020), (45, 14233284), (51, 12558780), (52, 12317265), (54, 11861070), (60, 10674963), (65, 9853812), (68, 9419085), (78, 8211510), (81, 7907380), (85, 7535268), (90, 7116642), (102, 6279390), (108, 5930535), (117, 5474340), (130, 4926906), (135, 4744428), (153, 4186260), (156, 4105755), (162, 3953690), (170, 3767634), (180, 3558321), (195, 3284604), (204, 3139695), (221, 2898180), (234, 2737170), (255, 2511756), (260, 2463453), (270, 2372214), (306, 2093130), (324, 1976845), (340, 1883817), (351, 1824780), (390, 1642302), (405, 1581476), (442, 1449090), (459, 1395420), (468, 1368585), (510, 1255878), (540, 1186107), (585, 1094868), (612, 1046565), (663, 966060), (702, 912390), (765, 837252), (780, 821151), (810, 790738), (884, 724545), (918, 697710), (1020, 627939), (1053, 608260), (1105, 579636), (1170, 547434), (1326, 483030), (1377, 465140), (1404, 456195), (1530, 418626), (1620, 395369), (1755, 364956), (1789, 358020), (1836, 348855), (1989, 322020), (2106, 304130), (2210, 289818), (2295, 279084), (2340, 273717), (2652, 241515), (2754, 232570), (3060, 209313), (3315, 193212), (3510, 182478), (3578, 179010), (3978, 161010), (4212, 152065), (4420, 144909), (4590, 139542), (5265, 121652), (5367, 119340), (5508, 116285), (5967, 107340), (6630, 96606), (6885, 93028), (7020, 91239), (7156, 89505), (7956, 80505), (8945, 71604), (9180, 69771), (9945, 64404), (10530, 60826), (10734, 59670), (11934, 53670), (13260, 48303), (13770, 46514), (16101, 39780), (17890, 35802), (17901, 35780), (19890, 32202), (21060, 30413), (21468, 29835), (23257, 27540), (23868, 26835)]