21293883

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{193}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 35590464

約数和(自身を除く): 14296581

約数列:

[1, 3, 9, 13, 23, 39, 41, 69, 117, 123, 193, 207, 299, 369, 533, 579, 897, 943, 1599, 1737, 2509, 2691, 2829, 4439, 4797, 7527, 7913, 8487, 12259, 13317, 22581, 23739, 36777, 39951, 57707, 71217, 102869, 110331, 173121, 181999, 308607, 519363, 545997, 925821, 1637991, 2365987, 7097961, 21293883]

約数ペア:

[(1, 21293883), (3, 7097961), (9, 2365987), (13, 1637991), (23, 925821), (39, 545997), (41, 519363), (69, 308607), (117, 181999), (123, 173121), (193, 110331), (207, 102869), (299, 71217), (369, 57707), (533, 39951), (579, 36777), (897, 23739), (943, 22581), (1599, 13317), (1737, 12259), (2509, 8487), (2691, 7913), (2829, 7527), (4439, 4797)]