640923840

素因数分解:

$2^6\times 3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:421

約数の個数: 280

約数和(自身を含む): 2316114240

約数和(自身を除く): 1675190400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 79, 80, 81, 90, 96, 108, 120, 135, 144, 158, 160, 162, 180, 192, 216, 237, 240, 270, 288, 313, 316, 320, 324, 360, 395, 405, 432, 474, 480, 540, 576, 626, 632, 648, 711, 720, 790, 810, 864, 939, 948, 960, 1080, 1185, 1252, 1264, 1296, 1422, 1440, 1565, 1580, 1620, 1728, 1878, 1896, 2133, 2160, 2370, 2504, 2528, 2592, 2817, 2844, 2880, 3130, 3160, 3240, 3555, 3756, 3792, 4266, 4320, 4695, 4740, 5008, 5056, 5184, 5634, 5688, 6260, 6320, 6399, 6480, 7110, 7512, 7584, 8451, 8532, 8640, 9390, 9480, 10016, 10665, 11268, 11376, 12520, 12640, 12798, 12960, 14085, 14220, 15024, 15168, 16902, 17064, 18780, 18960, 20032, 21330, 22536, 22752, 24727, 25040, 25280, 25353, 25596, 25920, 28170, 28440, 30048, 31995, 33804, 34128, 37560, 37920, 42255, 42660, 45072, 45504, 49454, 50080, 50706, 51192, 56340, 56880, 60096, 63990, 67608, 68256, 74181, 75120, 75840, 84510, 85320, 90144, 98908, 100160, 101412, 102384, 112680, 113760, 123635, 126765, 127980, 135216, 136512, 148362, 150240, 169020, 170640, 180288, 197816, 202824, 204768, 222543, 225360, 227520, 247270, 253530, 255960, 270432, 296724, 300480, 338040, 341280, 370905, 395632, 405648, 409536, 445086, 450720, 494540, 507060, 511920, 540864, 593448, 667629, 676080, 682560, 741810, 791264, 811296, 890172, 901440, 989080, 1014120, 1023840, 1112715, 1186896, 1335258, 1352160, 1483620, 1582528, 1622592, 1780344, 1978160, 2002887, 2028240, 2047680, 2225430, 2373792, 2670516, 2704320, 2967240, 3338145, 3560688, 3956320, 4005774, 4056480, 4450860, 4747584, 5341032, 5934480, 6676290, 7121376, 7912640, 8011548, 8112960, 8901720, 10014435, 10682064, 11868960, 13352580, 14242752, 16023096, 17803440, 20028870, 21364128, 23737920, 26705160, 32046192, 35606880, 40057740, 42728256, 53410320, 64092384, 71213760, 80115480, 106820640, 128184768, 160230960, 213641280, 320461920, 640923840]

約数ペア:

[(1, 640923840), (2, 320461920), (3, 213641280), (4, 160230960), (5, 128184768), (6, 106820640), (8, 80115480), (9, 71213760), (10, 64092384), (12, 53410320), (15, 42728256), (16, 40057740), (18, 35606880), (20, 32046192), (24, 26705160), (27, 23737920), (30, 21364128), (32, 20028870), (36, 17803440), (40, 16023096), (45, 14242752), (48, 13352580), (54, 11868960), (60, 10682064), (64, 10014435), (72, 8901720), (79, 8112960), (80, 8011548), (81, 7912640), (90, 7121376), (96, 6676290), (108, 5934480), (120, 5341032), (135, 4747584), (144, 4450860), (158, 4056480), (160, 4005774), (162, 3956320), (180, 3560688), (192, 3338145), (216, 2967240), (237, 2704320), (240, 2670516), (270, 2373792), (288, 2225430), (313, 2047680), (316, 2028240), (320, 2002887), (324, 1978160), (360, 1780344), (395, 1622592), (405, 1582528), (432, 1483620), (474, 1352160), (480, 1335258), (540, 1186896), (576, 1112715), (626, 1023840), (632, 1014120), (648, 989080), (711, 901440), (720, 890172), (790, 811296), (810, 791264), (864, 741810), (939, 682560), (948, 676080), (960, 667629), (1080, 593448), (1185, 540864), (1252, 511920), (1264, 507060), (1296, 494540), (1422, 450720), (1440, 445086), (1565, 409536), (1580, 405648), (1620, 395632), (1728, 370905), (1878, 341280), (1896, 338040), (2133, 300480), (2160, 296724), (2370, 270432), (2504, 255960), (2528, 253530), (2592, 247270), (2817, 227520), (2844, 225360), (2880, 222543), (3130, 204768), (3160, 202824), (3240, 197816), (3555, 180288), (3756, 170640), (3792, 169020), (4266, 150240), (4320, 148362), (4695, 136512), (4740, 135216), (5008, 127980), (5056, 126765), (5184, 123635), (5634, 113760), (5688, 112680), (6260, 102384), (6320, 101412), (6399, 100160), (6480, 98908), (7110, 90144), (7512, 85320), (7584, 84510), (8451, 75840), (8532, 75120), (8640, 74181), (9390, 68256), (9480, 67608), (10016, 63990), (10665, 60096), (11268, 56880), (11376, 56340), (12520, 51192), (12640, 50706), (12798, 50080), (12960, 49454), (14085, 45504), (14220, 45072), (15024, 42660), (15168, 42255), (16902, 37920), (17064, 37560), (18780, 34128), (18960, 33804), (20032, 31995), (21330, 30048), (22536, 28440), (22752, 28170), (24727, 25920), (25040, 25596), (25280, 25353)]