21809151

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{859}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 40069120

約数和(自身を除く): 18259969

約数列:

[1, 3, 7, 9, 13, 21, 31, 39, 63, 91, 93, 117, 217, 273, 279, 403, 651, 819, 859, 1209, 1953, 2577, 2821, 3627, 6013, 7731, 8463, 11167, 18039, 25389, 26629, 33501, 54117, 78169, 79887, 100503, 186403, 234507, 239661, 346177, 559209, 703521, 1038531, 1677627, 2423239, 3115593, 7269717, 21809151]

約数ペア:

[(1, 21809151), (3, 7269717), (7, 3115593), (9, 2423239), (13, 1677627), (21, 1038531), (31, 703521), (39, 559209), (63, 346177), (91, 239661), (93, 234507), (117, 186403), (217, 100503), (273, 79887), (279, 78169), (403, 54117), (651, 33501), (819, 26629), (859, 25389), (1209, 18039), (1953, 11167), (2577, 8463), (2821, 7731), (3627, 6013)]