18770661

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 35171136

約数和(自身を除く): 16400475

約数列:

[1, 3, 7, 9, 13, 21, 39, 41, 43, 63, 91, 117, 123, 129, 169, 273, 287, 301, 369, 387, 507, 533, 559, 819, 861, 903, 1183, 1521, 1599, 1677, 1763, 2583, 2709, 3549, 3731, 3913, 4797, 5031, 5289, 6929, 7267, 10647, 11193, 11739, 12341, 15867, 20787, 21801, 22919, 33579, 35217, 37023, 48503, 50869, 62361, 65403, 68757, 111069, 145509, 152607, 160433, 206271, 297947, 436527, 457821, 481299, 893841, 1443897, 2085629, 2681523, 6256887, 18770661]

約数ペア:

[(1, 18770661), (3, 6256887), (7, 2681523), (9, 2085629), (13, 1443897), (21, 893841), (39, 481299), (41, 457821), (43, 436527), (63, 297947), (91, 206271), (117, 160433), (123, 152607), (129, 145509), (169, 111069), (273, 68757), (287, 65403), (301, 62361), (369, 50869), (387, 48503), (507, 37023), (533, 35217), (559, 33579), (819, 22919), (861, 21801), (903, 20787), (1183, 15867), (1521, 12341), (1599, 11739), (1677, 11193), (1763, 10647), (2583, 7267), (2709, 6929), (3549, 5289), (3731, 5031), (3913, 4797)]