21910707

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{863}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 40255488

約数和(自身を除く): 18344781

約数列:

[1, 3, 7, 9, 13, 21, 31, 39, 63, 91, 93, 117, 217, 273, 279, 403, 651, 819, 863, 1209, 1953, 2589, 2821, 3627, 6041, 7767, 8463, 11219, 18123, 25389, 26753, 33657, 54369, 78533, 80259, 100971, 187271, 235599, 240777, 347789, 561813, 706797, 1043367, 1685439, 2434523, 3130101, 7303569, 21910707]

約数ペア:

[(1, 21910707), (3, 7303569), (7, 3130101), (9, 2434523), (13, 1685439), (21, 1043367), (31, 706797), (39, 561813), (63, 347789), (91, 240777), (93, 235599), (117, 187271), (217, 100971), (273, 80259), (279, 78533), (403, 54369), (651, 33657), (819, 26753), (863, 25389), (1209, 18123), (1953, 11219), (2589, 8463), (2821, 7767), (3627, 6041)]