21398013

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2903}}^1$

素因数の和:2935

約数の個数: 40

約数和(自身を含む): 39355008

約数和(自身を除く): 17956995

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2903, 7371, 8709, 20321, 26127, 37739, 60963, 78381, 113217, 182889, 235143, 264173, 339651, 548667, 792519, 1018953, 1646001, 2377557, 3056859, 7132671, 21398013]

約数ペア:

[(1, 21398013), (3, 7132671), (7, 3056859), (9, 2377557), (13, 1646001), (21, 1018953), (27, 792519), (39, 548667), (63, 339651), (81, 264173), (91, 235143), (117, 182889), (189, 113217), (273, 78381), (351, 60963), (567, 37739), (819, 26127), (1053, 20321), (2457, 8709), (2903, 7371)]