20486655

素因数分解:

$3^3\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{163}}^1$

素因数の和:210

約数の個数: 96

約数和(自身を含む): 44870400

約数和(自身を除く): 24383745

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 27, 35, 45, 49, 57, 63, 95, 105, 133, 135, 147, 163, 171, 189, 245, 285, 315, 399, 441, 489, 513, 665, 735, 815, 855, 931, 945, 1141, 1197, 1323, 1467, 1995, 2205, 2445, 2565, 2793, 3097, 3423, 3591, 4401, 4655, 5705, 5985, 6615, 7335, 7987, 8379, 9291, 10269, 13965, 15485, 17115, 17955, 21679, 22005, 23961, 25137, 27873, 30807, 39935, 41895, 46455, 51345, 65037, 71883, 83619, 108395, 119805, 125685, 139365, 151753, 154035, 195111, 215649, 325185, 359415, 418095, 455259, 585333, 758765, 975555, 1078245, 1365777, 2276295, 2926665, 4097331, 6828885, 20486655]

約数ペア:

[(1, 20486655), (3, 6828885), (5, 4097331), (7, 2926665), (9, 2276295), (15, 1365777), (19, 1078245), (21, 975555), (27, 758765), (35, 585333), (45, 455259), (49, 418095), (57, 359415), (63, 325185), (95, 215649), (105, 195111), (133, 154035), (135, 151753), (147, 139365), (163, 125685), (171, 119805), (189, 108395), (245, 83619), (285, 71883), (315, 65037), (399, 51345), (441, 46455), (489, 41895), (513, 39935), (665, 30807), (735, 27873), (815, 25137), (855, 23961), (931, 22005), (945, 21679), (1141, 17955), (1197, 17115), (1323, 15485), (1467, 13965), (1995, 10269), (2205, 9291), (2445, 8379), (2565, 7987), (2793, 7335), (3097, 6615), (3423, 5985), (3591, 5705), (4401, 4655)]