20902945

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^2$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 32711040

約数和(自身を除く): 11808095

約数列:

[1, 5, 7, 17, 19, 35, 43, 85, 95, 119, 133, 215, 301, 323, 595, 665, 731, 817, 1505, 1615, 1849, 2261, 3655, 4085, 5117, 5719, 9245, 11305, 12943, 13889, 25585, 28595, 31433, 35131, 64715, 69445, 97223, 157165, 175655, 220031, 245917, 486115, 597227, 1100155, 1229585, 2986135, 4180589, 20902945]

約数ペア:

[(1, 20902945), (5, 4180589), (7, 2986135), (17, 1229585), (19, 1100155), (35, 597227), (43, 486115), (85, 245917), (95, 220031), (119, 175655), (133, 157165), (215, 97223), (301, 69445), (323, 64715), (595, 35131), (665, 31433), (731, 28595), (817, 25585), (1505, 13889), (1615, 12943), (1849, 11305), (2261, 9245), (3655, 5719), (4085, 5117)]