81511920

素因数分解:

$2^4\times 3^5\times 5^1\times 7^1\times {\mathrm{599}}^1$

素因数の和:634

約数の個数: 240

約数和(自身を含む): 324979200

約数和(自身を除く): 243467280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 81, 84, 90, 105, 108, 112, 120, 126, 135, 140, 144, 162, 168, 180, 189, 210, 216, 240, 243, 252, 270, 280, 315, 324, 336, 360, 378, 405, 420, 432, 486, 504, 540, 560, 567, 599, 630, 648, 720, 756, 810, 840, 945, 972, 1008, 1080, 1134, 1198, 1215, 1260, 1296, 1512, 1620, 1680, 1701, 1797, 1890, 1944, 2160, 2268, 2396, 2430, 2520, 2835, 2995, 3024, 3240, 3402, 3594, 3780, 3888, 4193, 4536, 4792, 4860, 5040, 5391, 5670, 5990, 6480, 6804, 7188, 7560, 8386, 8505, 8985, 9072, 9584, 9720, 10782, 11340, 11980, 12579, 13608, 14376, 15120, 16173, 16772, 17010, 17970, 19440, 20965, 21564, 22680, 23960, 25158, 26955, 27216, 28752, 32346, 33544, 34020, 35940, 37737, 41930, 43128, 45360, 47920, 48519, 50316, 53910, 62895, 64692, 67088, 68040, 71880, 75474, 80865, 83860, 86256, 97038, 100632, 107820, 113211, 125790, 129384, 136080, 143760, 145557, 150948, 161730, 167720, 188685, 194076, 201264, 215640, 226422, 242595, 251580, 258768, 291114, 301896, 323460, 335440, 339633, 377370, 388152, 431280, 452844, 485190, 503160, 566055, 582228, 603792, 646920, 679266, 727785, 754740, 776304, 905688, 970380, 1006320, 1018899, 1132110, 1164456, 1293840, 1358532, 1455570, 1509480, 1698165, 1811376, 1940760, 2037798, 2264220, 2328912, 2717064, 2911140, 3018960, 3396330, 3881520, 4075596, 4528440, 5094495, 5434128, 5822280, 6792660, 8151192, 9056880, 10188990, 11644560, 13585320, 16302384, 20377980, 27170640, 40755960, 81511920]

約数ペア:

[(1, 81511920), (2, 40755960), (3, 27170640), (4, 20377980), (5, 16302384), (6, 13585320), (7, 11644560), (8, 10188990), (9, 9056880), (10, 8151192), (12, 6792660), (14, 5822280), (15, 5434128), (16, 5094495), (18, 4528440), (20, 4075596), (21, 3881520), (24, 3396330), (27, 3018960), (28, 2911140), (30, 2717064), (35, 2328912), (36, 2264220), (40, 2037798), (42, 1940760), (45, 1811376), (48, 1698165), (54, 1509480), (56, 1455570), (60, 1358532), (63, 1293840), (70, 1164456), (72, 1132110), (80, 1018899), (81, 1006320), (84, 970380), (90, 905688), (105, 776304), (108, 754740), (112, 727785), (120, 679266), (126, 646920), (135, 603792), (140, 582228), (144, 566055), (162, 503160), (168, 485190), (180, 452844), (189, 431280), (210, 388152), (216, 377370), (240, 339633), (243, 335440), (252, 323460), (270, 301896), (280, 291114), (315, 258768), (324, 251580), (336, 242595), (360, 226422), (378, 215640), (405, 201264), (420, 194076), (432, 188685), (486, 167720), (504, 161730), (540, 150948), (560, 145557), (567, 143760), (599, 136080), (630, 129384), (648, 125790), (720, 113211), (756, 107820), (810, 100632), (840, 97038), (945, 86256), (972, 83860), (1008, 80865), (1080, 75474), (1134, 71880), (1198, 68040), (1215, 67088), (1260, 64692), (1296, 62895), (1512, 53910), (1620, 50316), (1680, 48519), (1701, 47920), (1797, 45360), (1890, 43128), (1944, 41930), (2160, 37737), (2268, 35940), (2396, 34020), (2430, 33544), (2520, 32346), (2835, 28752), (2995, 27216), (3024, 26955), (3240, 25158), (3402, 23960), (3594, 22680), (3780, 21564), (3888, 20965), (4193, 19440), (4536, 17970), (4792, 17010), (4860, 16772), (5040, 16173), (5391, 15120), (5670, 14376), (5990, 13608), (6480, 12579), (6804, 11980), (7188, 11340), (7560, 10782), (8386, 9720), (8505, 9584), (8985, 9072)]