21469240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:137

約数の個数: 128

約数和(自身を含む): 57153600

約数和(自身を除く): 35684360

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 41, 52, 53, 65, 76, 82, 95, 104, 106, 130, 152, 164, 190, 205, 212, 247, 260, 265, 328, 380, 410, 424, 494, 520, 530, 533, 689, 760, 779, 820, 988, 1007, 1060, 1066, 1235, 1378, 1558, 1640, 1976, 2014, 2120, 2132, 2173, 2470, 2665, 2756, 3116, 3445, 3895, 4028, 4264, 4346, 4940, 5035, 5330, 5512, 6232, 6890, 7790, 8056, 8692, 9880, 10070, 10127, 10660, 10865, 13091, 13780, 15580, 17384, 20140, 20254, 21320, 21730, 26182, 27560, 28249, 31160, 40280, 40508, 41287, 43460, 50635, 52364, 56498, 65455, 81016, 82574, 86920, 101270, 104728, 112996, 130910, 141245, 165148, 202540, 206435, 225992, 261820, 282490, 330296, 405080, 412870, 523640, 536731, 564980, 825740, 1073462, 1129960, 1651480, 2146924, 2683655, 4293848, 5367310, 10734620, 21469240]

約数ペア:

[(1, 21469240), (2, 10734620), (4, 5367310), (5, 4293848), (8, 2683655), (10, 2146924), (13, 1651480), (19, 1129960), (20, 1073462), (26, 825740), (38, 564980), (40, 536731), (41, 523640), (52, 412870), (53, 405080), (65, 330296), (76, 282490), (82, 261820), (95, 225992), (104, 206435), (106, 202540), (130, 165148), (152, 141245), (164, 130910), (190, 112996), (205, 104728), (212, 101270), (247, 86920), (260, 82574), (265, 81016), (328, 65455), (380, 56498), (410, 52364), (424, 50635), (494, 43460), (520, 41287), (530, 40508), (533, 40280), (689, 31160), (760, 28249), (779, 27560), (820, 26182), (988, 21730), (1007, 21320), (1060, 20254), (1066, 20140), (1235, 17384), (1378, 15580), (1558, 13780), (1640, 13091), (1976, 10865), (2014, 10660), (2120, 10127), (2132, 10070), (2173, 9880), (2470, 8692), (2665, 8056), (2756, 7790), (3116, 6890), (3445, 6232), (3895, 5512), (4028, 5330), (4264, 5035), (4346, 4940)]