20178171

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{313}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 34288800

約数和(自身を除く): 14110629

約数列:

[1, 3, 9, 13, 19, 29, 39, 57, 87, 117, 171, 247, 261, 313, 377, 551, 741, 939, 1131, 1653, 2223, 2817, 3393, 4069, 4959, 5947, 7163, 9077, 12207, 17841, 21489, 27231, 36621, 53523, 64467, 77311, 81693, 118001, 172463, 231933, 354003, 517389, 695799, 1062009, 1552167, 2242019, 6726057, 20178171]

約数ペア:

[(1, 20178171), (3, 6726057), (9, 2242019), (13, 1552167), (19, 1062009), (29, 695799), (39, 517389), (57, 354003), (87, 231933), (117, 172463), (171, 118001), (247, 81693), (261, 77311), (313, 64467), (377, 53523), (551, 36621), (741, 27231), (939, 21489), (1131, 17841), (1653, 12207), (2223, 9077), (2817, 7163), (3393, 5947), (4069, 4959)]