12858820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{137}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 30915864

約数和(自身を除く): 18057044

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 137, 190, 247, 260, 274, 361, 380, 494, 548, 685, 722, 988, 1235, 1370, 1444, 1781, 1805, 2470, 2603, 2740, 3562, 3610, 4693, 4940, 5206, 7124, 7220, 8905, 9386, 10412, 13015, 17810, 18772, 23465, 26030, 33839, 35620, 46930, 49457, 52060, 67678, 93860, 98914, 135356, 169195, 197828, 247285, 338390, 494570, 642941, 676780, 989140, 1285882, 2571764, 3214705, 6429410, 12858820]

約数ペア:

[(1, 12858820), (2, 6429410), (4, 3214705), (5, 2571764), (10, 1285882), (13, 989140), (19, 676780), (20, 642941), (26, 494570), (38, 338390), (52, 247285), (65, 197828), (76, 169195), (95, 135356), (130, 98914), (137, 93860), (190, 67678), (247, 52060), (260, 49457), (274, 46930), (361, 35620), (380, 33839), (494, 26030), (548, 23465), (685, 18772), (722, 17810), (988, 13015), (1235, 10412), (1370, 9386), (1444, 8905), (1781, 7220), (1805, 7124), (2470, 5206), (2603, 4940), (2740, 4693), (3562, 3610)]