28913157

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{821}}^1$

素因数の和:890

約数の個数: 48

約数和(自身を含む): 52660608

約数和(自身を除く): 23747451

約数列:

[1, 3, 7, 9, 13, 21, 39, 43, 63, 91, 117, 129, 273, 301, 387, 559, 819, 821, 903, 1677, 2463, 2709, 3913, 5031, 5747, 7389, 10673, 11739, 17241, 32019, 35217, 35303, 51723, 74711, 96057, 105909, 224133, 247121, 317727, 458939, 672399, 741363, 1376817, 2224089, 3212573, 4130451, 9637719, 28913157]

約数ペア:

[(1, 28913157), (3, 9637719), (7, 4130451), (9, 3212573), (13, 2224089), (21, 1376817), (39, 741363), (43, 672399), (63, 458939), (91, 317727), (117, 247121), (129, 224133), (273, 105909), (301, 96057), (387, 74711), (559, 51723), (819, 35303), (821, 35217), (903, 32019), (1677, 17241), (2463, 11739), (2709, 10673), (3913, 7389), (5031, 5747)]