18885555

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{211}}^1$

素因数の和:258

約数の個数: 80

約数和(自身を含む): 38785824

約数和(自身を除く): 19900269

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 81, 85, 117, 135, 153, 195, 211, 221, 255, 351, 405, 459, 585, 633, 663, 765, 1053, 1055, 1105, 1377, 1755, 1899, 1989, 2295, 2743, 3165, 3315, 3587, 5265, 5697, 5967, 6885, 8229, 9495, 9945, 10761, 13715, 17091, 17901, 17935, 24687, 28485, 29835, 32283, 41145, 46631, 53805, 74061, 85455, 89505, 96849, 123435, 139893, 161415, 222183, 233155, 290547, 370305, 419679, 484245, 699465, 1110915, 1259037, 1452735, 2098395, 3777111, 6295185, 18885555]

約数ペア:

[(1, 18885555), (3, 6295185), (5, 3777111), (9, 2098395), (13, 1452735), (15, 1259037), (17, 1110915), (27, 699465), (39, 484245), (45, 419679), (51, 370305), (65, 290547), (81, 233155), (85, 222183), (117, 161415), (135, 139893), (153, 123435), (195, 96849), (211, 89505), (221, 85455), (255, 74061), (351, 53805), (405, 46631), (459, 41145), (585, 32283), (633, 29835), (663, 28485), (765, 24687), (1053, 17935), (1055, 17901), (1105, 17091), (1377, 13715), (1755, 10761), (1899, 9945), (1989, 9495), (2295, 8229), (2743, 6885), (3165, 5967), (3315, 5697), (3587, 5265)]