21680780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^2\times {\mathrm{31}}^1$

素因数の和:96

約数の個数: 108

約数和(自身を含む): 54876864

約数和(自身を除く): 33196084

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 31, 34, 44, 55, 62, 68, 85, 110, 121, 124, 155, 170, 187, 220, 242, 289, 310, 340, 341, 374, 484, 527, 578, 605, 620, 682, 748, 935, 1054, 1156, 1210, 1364, 1445, 1705, 1870, 2057, 2108, 2420, 2635, 2890, 3179, 3410, 3740, 3751, 4114, 5270, 5780, 5797, 6358, 6820, 7502, 8228, 8959, 10285, 10540, 11594, 12716, 15004, 15895, 17918, 18755, 20570, 23188, 28985, 31790, 34969, 35836, 37510, 41140, 44795, 57970, 63580, 63767, 69938, 75020, 89590, 98549, 115940, 127534, 139876, 174845, 179180, 197098, 255068, 318835, 349690, 394196, 492745, 637670, 699380, 985490, 1084039, 1275340, 1970980, 2168078, 4336156, 5420195, 10840390, 21680780]

約数ペア:

[(1, 21680780), (2, 10840390), (4, 5420195), (5, 4336156), (10, 2168078), (11, 1970980), (17, 1275340), (20, 1084039), (22, 985490), (31, 699380), (34, 637670), (44, 492745), (55, 394196), (62, 349690), (68, 318835), (85, 255068), (110, 197098), (121, 179180), (124, 174845), (155, 139876), (170, 127534), (187, 115940), (220, 98549), (242, 89590), (289, 75020), (310, 69938), (340, 63767), (341, 63580), (374, 57970), (484, 44795), (527, 41140), (578, 37510), (605, 35836), (620, 34969), (682, 31790), (748, 28985), (935, 23188), (1054, 20570), (1156, 18755), (1210, 17918), (1364, 15895), (1445, 15004), (1705, 12716), (1870, 11594), (2057, 10540), (2108, 10285), (2420, 8959), (2635, 8228), (2890, 7502), (3179, 6820), (3410, 6358), (3740, 5797), (3751, 5780), (4114, 5270)]