20681280

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:233

約数の個数: 168

約数和(自身を含む): 73225152

約数和(自身を除く): 52543872

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 43, 45, 48, 60, 64, 72, 80, 86, 90, 96, 120, 129, 144, 160, 167, 172, 180, 192, 215, 240, 258, 288, 320, 334, 344, 360, 387, 430, 480, 501, 516, 576, 645, 668, 688, 720, 774, 835, 860, 960, 1002, 1032, 1290, 1336, 1376, 1440, 1503, 1548, 1670, 1720, 1935, 2004, 2064, 2505, 2580, 2672, 2752, 2880, 3006, 3096, 3340, 3440, 3870, 4008, 4128, 5010, 5160, 5344, 6012, 6192, 6680, 6880, 7181, 7515, 7740, 8016, 8256, 10020, 10320, 10688, 12024, 12384, 13360, 13760, 14362, 15030, 15480, 16032, 20040, 20640, 21543, 24048, 24768, 26720, 28724, 30060, 30960, 32064, 35905, 40080, 41280, 43086, 48096, 53440, 57448, 60120, 61920, 64629, 71810, 80160, 86172, 96192, 107715, 114896, 120240, 123840, 129258, 143620, 160320, 172344, 215430, 229792, 240480, 258516, 287240, 323145, 344688, 430860, 459584, 480960, 517032, 574480, 646290, 689376, 861720, 1034064, 1148960, 1292580, 1378752, 1723440, 2068128, 2297920, 2585160, 3446880, 4136256, 5170320, 6893760, 10340640, 20681280]

約数ペア:

[(1, 20681280), (2, 10340640), (3, 6893760), (4, 5170320), (5, 4136256), (6, 3446880), (8, 2585160), (9, 2297920), (10, 2068128), (12, 1723440), (15, 1378752), (16, 1292580), (18, 1148960), (20, 1034064), (24, 861720), (30, 689376), (32, 646290), (36, 574480), (40, 517032), (43, 480960), (45, 459584), (48, 430860), (60, 344688), (64, 323145), (72, 287240), (80, 258516), (86, 240480), (90, 229792), (96, 215430), (120, 172344), (129, 160320), (144, 143620), (160, 129258), (167, 123840), (172, 120240), (180, 114896), (192, 107715), (215, 96192), (240, 86172), (258, 80160), (288, 71810), (320, 64629), (334, 61920), (344, 60120), (360, 57448), (387, 53440), (430, 48096), (480, 43086), (501, 41280), (516, 40080), (576, 35905), (645, 32064), (668, 30960), (688, 30060), (720, 28724), (774, 26720), (835, 24768), (860, 24048), (960, 21543), (1002, 20640), (1032, 20040), (1290, 16032), (1336, 15480), (1376, 15030), (1440, 14362), (1503, 13760), (1548, 13360), (1670, 12384), (1720, 12024), (1935, 10688), (2004, 10320), (2064, 10020), (2505, 8256), (2580, 8016), (2672, 7740), (2752, 7515), (2880, 7181), (3006, 6880), (3096, 6680), (3340, 6192), (3440, 6012), (3870, 5344), (4008, 5160), (4128, 5010)]