28840917

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^2\times {\mathrm{43}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 48519680

約数和(自身を除く): 19678763

約数列:

[1, 3, 7, 19, 21, 41, 43, 57, 123, 129, 133, 287, 301, 399, 779, 817, 861, 903, 1681, 1763, 2337, 2451, 5043, 5289, 5453, 5719, 11767, 12341, 16359, 17157, 31939, 33497, 35301, 37023, 72283, 95817, 100491, 216849, 223573, 234479, 505981, 670719, 703437, 1373377, 1517943, 4120131, 9613639, 28840917]

約数ペア:

[(1, 28840917), (3, 9613639), (7, 4120131), (19, 1517943), (21, 1373377), (41, 703437), (43, 670719), (57, 505981), (123, 234479), (129, 223573), (133, 216849), (287, 100491), (301, 95817), (399, 72283), (779, 37023), (817, 35301), (861, 33497), (903, 31939), (1681, 17157), (1763, 16359), (2337, 12341), (2451, 11767), (5043, 5719), (5289, 5453)]