21307806

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 51609600

約数和(自身を除く): 30301794

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 78, 117, 127, 234, 239, 254, 351, 381, 478, 702, 717, 762, 1143, 1434, 1651, 2151, 2286, 3107, 3302, 3429, 4302, 4953, 6214, 6453, 6858, 9321, 9906, 12906, 14859, 18642, 27963, 29718, 30353, 44577, 55926, 60706, 83889, 89154, 91059, 167778, 182118, 273177, 394589, 546354, 789178, 819531, 1183767, 1639062, 2367534, 3551301, 7102602, 10653903, 21307806]

約数ペア:

[(1, 21307806), (2, 10653903), (3, 7102602), (6, 3551301), (9, 2367534), (13, 1639062), (18, 1183767), (26, 819531), (27, 789178), (39, 546354), (54, 394589), (78, 273177), (117, 182118), (127, 167778), (234, 91059), (239, 89154), (254, 83889), (351, 60706), (381, 55926), (478, 44577), (702, 30353), (717, 29718), (762, 27963), (1143, 18642), (1434, 14859), (1651, 12906), (2151, 9906), (2286, 9321), (3107, 6858), (3302, 6453), (3429, 6214), (4302, 4953)]