20898185

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1$

素因数の和:174

約数の個数: 64

約数和(自身を含む): 34504704

約数和(自身を除く): 13606519

約数列:

[1, 5, 7, 11, 17, 31, 35, 55, 77, 85, 103, 119, 155, 187, 217, 341, 385, 515, 527, 595, 721, 935, 1085, 1133, 1309, 1705, 1751, 2387, 2635, 3193, 3605, 3689, 5665, 5797, 6545, 7931, 8755, 11935, 12257, 15965, 18445, 19261, 22351, 28985, 35123, 39655, 40579, 54281, 61285, 96305, 111755, 134827, 175615, 202895, 245861, 271405, 379967, 597091, 674135, 1229305, 1899835, 2985455, 4179637, 20898185]

約数ペア:

[(1, 20898185), (5, 4179637), (7, 2985455), (11, 1899835), (17, 1229305), (31, 674135), (35, 597091), (55, 379967), (77, 271405), (85, 245861), (103, 202895), (119, 175615), (155, 134827), (187, 111755), (217, 96305), (341, 61285), (385, 54281), (515, 40579), (527, 39655), (595, 35123), (721, 28985), (935, 22351), (1085, 19261), (1133, 18445), (1309, 15965), (1705, 12257), (1751, 11935), (2387, 8755), (2635, 7931), (3193, 6545), (3605, 5797), (3689, 5665)]