990721920

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:405

約数の個数: 256

約数和(自身を含む): 3384115200

約数和(自身を除く): 2393393280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 48, 51, 60, 64, 68, 80, 85, 96, 102, 120, 127, 128, 136, 160, 170, 192, 204, 239, 240, 254, 255, 272, 320, 340, 381, 384, 408, 478, 480, 508, 510, 544, 635, 640, 680, 717, 762, 816, 956, 960, 1016, 1020, 1088, 1195, 1270, 1360, 1434, 1524, 1632, 1905, 1912, 1920, 2032, 2040, 2159, 2176, 2390, 2540, 2720, 2868, 3048, 3264, 3585, 3810, 3824, 4063, 4064, 4080, 4318, 4780, 5080, 5440, 5736, 6096, 6477, 6528, 7170, 7620, 7648, 8126, 8128, 8160, 8636, 9560, 10160, 10795, 10880, 11472, 12189, 12192, 12954, 14340, 15240, 15296, 16252, 16256, 16320, 17272, 19120, 20315, 20320, 21590, 22944, 24378, 24384, 25908, 28680, 30353, 30480, 30592, 32385, 32504, 32640, 34544, 38240, 40630, 40640, 43180, 45888, 48756, 48768, 51816, 57360, 60706, 60945, 60960, 64770, 65008, 69088, 76480, 81260, 81280, 86360, 91059, 91776, 97512, 103632, 114720, 121412, 121890, 121920, 129540, 130016, 138176, 151765, 152960, 162520, 172720, 182118, 195024, 207264, 229440, 242824, 243780, 243840, 259080, 260032, 276352, 303530, 325040, 345440, 364236, 390048, 414528, 455295, 458880, 485648, 487560, 516001, 518160, 520064, 607060, 650080, 690880, 728472, 780096, 829056, 910590, 971296, 975120, 1032002, 1036320, 1214120, 1300160, 1381760, 1456944, 1548003, 1560192, 1821180, 1942592, 1950240, 2064004, 2072640, 2428240, 2580005, 2600320, 2913888, 3096006, 3642360, 3885184, 3900480, 4128008, 4145280, 4856480, 5160010, 5827776, 6192012, 7284720, 7740015, 7800960, 8256016, 9712960, 10320020, 11655552, 12384024, 14569440, 15480030, 16512032, 19425920, 20640040, 24768048, 29138880, 30960060, 33024064, 41280080, 49536096, 58277760, 61920120, 66048128, 82560160, 99072192, 123840240, 165120320, 198144384, 247680480, 330240640, 495360960, 990721920]

約数ペア:

[(1, 990721920), (2, 495360960), (3, 330240640), (4, 247680480), (5, 198144384), (6, 165120320), (8, 123840240), (10, 99072192), (12, 82560160), (15, 66048128), (16, 61920120), (17, 58277760), (20, 49536096), (24, 41280080), (30, 33024064), (32, 30960060), (34, 29138880), (40, 24768048), (48, 20640040), (51, 19425920), (60, 16512032), (64, 15480030), (68, 14569440), (80, 12384024), (85, 11655552), (96, 10320020), (102, 9712960), (120, 8256016), (127, 7800960), (128, 7740015), (136, 7284720), (160, 6192012), (170, 5827776), (192, 5160010), (204, 4856480), (239, 4145280), (240, 4128008), (254, 3900480), (255, 3885184), (272, 3642360), (320, 3096006), (340, 2913888), (381, 2600320), (384, 2580005), (408, 2428240), (478, 2072640), (480, 2064004), (508, 1950240), (510, 1942592), (544, 1821180), (635, 1560192), (640, 1548003), (680, 1456944), (717, 1381760), (762, 1300160), (816, 1214120), (956, 1036320), (960, 1032002), (1016, 975120), (1020, 971296), (1088, 910590), (1195, 829056), (1270, 780096), (1360, 728472), (1434, 690880), (1524, 650080), (1632, 607060), (1905, 520064), (1912, 518160), (1920, 516001), (2032, 487560), (2040, 485648), (2159, 458880), (2176, 455295), (2390, 414528), (2540, 390048), (2720, 364236), (2868, 345440), (3048, 325040), (3264, 303530), (3585, 276352), (3810, 260032), (3824, 259080), (4063, 243840), (4064, 243780), (4080, 242824), (4318, 229440), (4780, 207264), (5080, 195024), (5440, 182118), (5736, 172720), (6096, 162520), (6477, 152960), (6528, 151765), (7170, 138176), (7620, 130016), (7648, 129540), (8126, 121920), (8128, 121890), (8160, 121412), (8636, 114720), (9560, 103632), (10160, 97512), (10795, 91776), (10880, 91059), (11472, 86360), (12189, 81280), (12192, 81260), (12954, 76480), (14340, 69088), (15240, 65008), (15296, 64770), (16252, 60960), (16256, 60945), (16320, 60706), (17272, 57360), (19120, 51816), (20315, 48768), (20320, 48756), (21590, 45888), (22944, 43180), (24378, 40640), (24384, 40630), (25908, 38240), (28680, 34544), (30353, 32640), (30480, 32504), (30592, 32385)]