20218842475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{1217}}^1$

素因数の和:1385

約数の個数: 96

約数和(自身を含む): 29839090176

約数和(自身を除く): 9620247701

約数列:

[1, 5, 13, 17, 25, 31, 65, 85, 97, 155, 221, 325, 403, 425, 485, 527, 775, 1105, 1217, 1261, 1649, 2015, 2425, 2635, 3007, 5525, 6085, 6305, 6851, 8245, 10075, 13175, 15035, 15821, 20689, 21437, 30425, 31525, 34255, 37727, 39091, 41225, 51119, 75175, 79105, 103445, 107185, 118049, 171275, 188635, 195455, 255595, 268957, 395525, 490451, 517225, 535925, 590245, 641359, 664547, 943175, 977275, 1277975, 1344785, 1534637, 2006833, 2452255, 2951225, 3206795, 3322735, 3659519, 6723925, 7673185, 8337667, 10034165, 12261275, 16033975, 16613675, 18297595, 26088829, 38365925, 41688335, 47573747, 50170825, 62211823, 91487975, 130444145, 208441675, 237868735, 311059115, 652220725, 808753699, 1189343675, 1555295575, 4043768495, 20218842475]

約数ペア:

[(1, 20218842475), (5, 4043768495), (13, 1555295575), (17, 1189343675), (25, 808753699), (31, 652220725), (65, 311059115), (85, 237868735), (97, 208441675), (155, 130444145), (221, 91487975), (325, 62211823), (403, 50170825), (425, 47573747), (485, 41688335), (527, 38365925), (775, 26088829), (1105, 18297595), (1217, 16613675), (1261, 16033975), (1649, 12261275), (2015, 10034165), (2425, 8337667), (2635, 7673185), (3007, 6723925), (5525, 3659519), (6085, 3322735), (6305, 3206795), (6851, 2951225), (8245, 2452255), (10075, 2006833), (13175, 1534637), (15035, 1344785), (15821, 1277975), (20689, 977275), (21437, 943175), (30425, 664547), (31525, 641359), (34255, 590245), (37727, 535925), (39091, 517225), (41225, 490451), (51119, 395525), (75175, 268957), (79105, 255595), (103445, 195455), (107185, 188635), (118049, 171275)]