20022821

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^2$

素因数の和:130

約数の個数: 36

約数和(自身を含む): 27191052

約数和(自身を除く): 7168231

約数列:

[1, 7, 13, 17, 43, 49, 91, 119, 221, 301, 559, 637, 731, 833, 1547, 1849, 2107, 3913, 5117, 9503, 10829, 12943, 24037, 27391, 31433, 35819, 66521, 90601, 168259, 220031, 408629, 465647, 1177813, 1540217, 2860403, 20022821]

約数ペア:

[(1, 20022821), (7, 2860403), (13, 1540217), (17, 1177813), (43, 465647), (49, 408629), (91, 220031), (119, 168259), (221, 90601), (301, 66521), (559, 35819), (637, 31433), (731, 27391), (833, 24037), (1547, 12943), (1849, 10829), (2107, 9503), (3913, 5117)]