81487623

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 136249344

約数和(自身を除く): 54761721

約数列:

[1, 3, 7, 21, 31, 41, 43, 71, 93, 123, 129, 213, 217, 287, 301, 497, 651, 861, 903, 1271, 1333, 1491, 1763, 2201, 2911, 3053, 3813, 3999, 5289, 6603, 8733, 8897, 9159, 9331, 12341, 15407, 20377, 21371, 26691, 27993, 37023, 46221, 54653, 61131, 64113, 90241, 94643, 125173, 163959, 270723, 283929, 375519, 382571, 631687, 662501, 876211, 1147713, 1895061, 1987503, 2628633, 3880363, 11641089, 27162541, 81487623]

約数ペア:

[(1, 81487623), (3, 27162541), (7, 11641089), (21, 3880363), (31, 2628633), (41, 1987503), (43, 1895061), (71, 1147713), (93, 876211), (123, 662501), (129, 631687), (213, 382571), (217, 375519), (287, 283929), (301, 270723), (497, 163959), (651, 125173), (861, 94643), (903, 90241), (1271, 64113), (1333, 61131), (1491, 54653), (1763, 46221), (2201, 37023), (2911, 27993), (3053, 26691), (3813, 21371), (3999, 20377), (5289, 15407), (6603, 12341), (8733, 9331), (8897, 9159)]