81999255

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:480

約数の個数: 64

約数和(自身を含む): 150958080

約数和(自身を除く): 68958825

約数列:

[1, 3, 5, 13, 15, 23, 39, 47, 65, 69, 115, 141, 195, 235, 299, 345, 389, 611, 705, 897, 1081, 1167, 1495, 1833, 1945, 3055, 3243, 4485, 5057, 5405, 5835, 8947, 9165, 14053, 15171, 16215, 18283, 25285, 26841, 42159, 44735, 54849, 70265, 75855, 91415, 116311, 134205, 210795, 237679, 274245, 348933, 420509, 581555, 713037, 1188395, 1261527, 1744665, 2102545, 3565185, 5466617, 6307635, 16399851, 27333085, 81999255]

約数ペア:

[(1, 81999255), (3, 27333085), (5, 16399851), (13, 6307635), (15, 5466617), (23, 3565185), (39, 2102545), (47, 1744665), (65, 1261527), (69, 1188395), (115, 713037), (141, 581555), (195, 420509), (235, 348933), (299, 274245), (345, 237679), (389, 210795), (611, 134205), (705, 116311), (897, 91415), (1081, 75855), (1167, 70265), (1495, 54849), (1833, 44735), (1945, 42159), (3055, 26841), (3243, 25285), (4485, 18283), (5057, 16215), (5405, 15171), (5835, 14053), (8947, 9165)]