20118840

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:621

約数の個数: 128

約数和(自身を含む): 70709760

約数和(自身を除く): 50590920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 43, 56, 60, 70, 84, 86, 105, 120, 129, 140, 168, 172, 210, 215, 258, 280, 301, 344, 420, 430, 516, 557, 602, 645, 840, 860, 903, 1032, 1114, 1204, 1290, 1505, 1671, 1720, 1806, 2228, 2408, 2580, 2785, 3010, 3342, 3612, 3899, 4456, 4515, 5160, 5570, 6020, 6684, 7224, 7798, 8355, 9030, 11140, 11697, 12040, 13368, 15596, 16710, 18060, 19495, 22280, 23394, 23951, 31192, 33420, 36120, 38990, 46788, 47902, 58485, 66840, 71853, 77980, 93576, 95804, 116970, 119755, 143706, 155960, 167657, 191608, 233940, 239510, 287412, 335314, 359265, 467880, 479020, 502971, 574824, 670628, 718530, 838285, 958040, 1005942, 1341256, 1437060, 1676570, 2011884, 2514855, 2874120, 3353140, 4023768, 5029710, 6706280, 10059420, 20118840]

約数ペア:

[(1, 20118840), (2, 10059420), (3, 6706280), (4, 5029710), (5, 4023768), (6, 3353140), (7, 2874120), (8, 2514855), (10, 2011884), (12, 1676570), (14, 1437060), (15, 1341256), (20, 1005942), (21, 958040), (24, 838285), (28, 718530), (30, 670628), (35, 574824), (40, 502971), (42, 479020), (43, 467880), (56, 359265), (60, 335314), (70, 287412), (84, 239510), (86, 233940), (105, 191608), (120, 167657), (129, 155960), (140, 143706), (168, 119755), (172, 116970), (210, 95804), (215, 93576), (258, 77980), (280, 71853), (301, 66840), (344, 58485), (420, 47902), (430, 46788), (516, 38990), (557, 36120), (602, 33420), (645, 31192), (840, 23951), (860, 23394), (903, 22280), (1032, 19495), (1114, 18060), (1204, 16710), (1290, 15596), (1505, 13368), (1671, 12040), (1720, 11697), (1806, 11140), (2228, 9030), (2408, 8355), (2580, 7798), (2785, 7224), (3010, 6684), (3342, 6020), (3612, 5570), (3899, 5160), (4456, 4515)]