28920801

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 49541760

約数和(自身を除く): 20620959

約数列:

[1, 3, 7, 13, 21, 29, 39, 87, 91, 169, 203, 273, 281, 377, 507, 609, 843, 1131, 1183, 1967, 2639, 3549, 3653, 4901, 5901, 7917, 8149, 10959, 14703, 24447, 25571, 34307, 47489, 57043, 76713, 102921, 105937, 142467, 171129, 317811, 332423, 741559, 997269, 1377181, 2224677, 4131543, 9640267, 28920801]

約数ペア:

[(1, 28920801), (3, 9640267), (7, 4131543), (13, 2224677), (21, 1377181), (29, 997269), (39, 741559), (87, 332423), (91, 317811), (169, 171129), (203, 142467), (273, 105937), (281, 102921), (377, 76713), (507, 57043), (609, 47489), (843, 34307), (1131, 25571), (1183, 24447), (1967, 14703), (2639, 10959), (3549, 8149), (3653, 7917), (4901, 5901)]