20017881

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:183

約数の個数: 48

約数和(自身を含む): 33203520

約数和(自身を除く): 13185639

約数列:

[1, 3, 9, 13, 27, 39, 41, 107, 117, 123, 169, 321, 351, 369, 507, 533, 963, 1107, 1391, 1521, 1599, 2889, 4173, 4387, 4563, 4797, 6929, 12519, 13161, 14391, 18083, 20787, 37557, 39483, 54249, 57031, 62361, 118449, 162747, 171093, 187083, 488241, 513279, 741403, 1539837, 2224209, 6672627, 20017881]

約数ペア:

[(1, 20017881), (3, 6672627), (9, 2224209), (13, 1539837), (27, 741403), (39, 513279), (41, 488241), (107, 187083), (117, 171093), (123, 162747), (169, 118449), (321, 62361), (351, 57031), (369, 54249), (507, 39483), (533, 37557), (963, 20787), (1107, 18083), (1391, 14391), (1521, 13161), (1599, 12519), (2889, 6929), (4173, 4797), (4387, 4563)]