19918305

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:308

約数の個数: 80

約数和(自身を含む): 41399424

約数和(自身を除く): 21481119

約数列:

[1, 3, 5, 9, 11, 15, 17, 27, 33, 45, 51, 55, 81, 85, 99, 135, 153, 165, 187, 255, 263, 297, 405, 459, 495, 561, 765, 789, 891, 935, 1315, 1377, 1485, 1683, 2295, 2367, 2805, 2893, 3945, 4455, 4471, 5049, 6885, 7101, 8415, 8679, 11835, 13413, 14465, 15147, 21303, 22355, 25245, 26037, 35505, 40239, 43395, 49181, 67065, 75735, 78111, 106515, 120717, 130185, 147543, 201195, 234333, 245905, 362151, 390555, 442629, 603585, 737715, 1171665, 1327887, 1810755, 2213145, 3983661, 6639435, 19918305]

約数ペア:

[(1, 19918305), (3, 6639435), (5, 3983661), (9, 2213145), (11, 1810755), (15, 1327887), (17, 1171665), (27, 737715), (33, 603585), (45, 442629), (51, 390555), (55, 362151), (81, 245905), (85, 234333), (99, 201195), (135, 147543), (153, 130185), (165, 120717), (187, 106515), (255, 78111), (263, 75735), (297, 67065), (405, 49181), (459, 43395), (495, 40239), (561, 35505), (765, 26037), (789, 25245), (891, 22355), (935, 21303), (1315, 15147), (1377, 14465), (1485, 13413), (1683, 11835), (2295, 8679), (2367, 8415), (2805, 7101), (2893, 6885), (3945, 5049), (4455, 4471)]