81803540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6421}}^1$

素因数の和:6457

約数の個数: 72

約数和(自身を含む): 215239752

約数和(自身を除く): 133436212

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 6421, 12740, 12842, 25684, 32105, 44947, 64210, 83473, 89894, 128420, 166946, 179788, 224735, 314629, 333892, 417365, 449470, 584311, 629258, 834730, 898940, 1168622, 1258516, 1573145, 1669460, 2337244, 2921555, 3146290, 4090177, 5843110, 6292580, 8180354, 11686220, 16360708, 20450885, 40901770, 81803540]

約数ペア:

[(1, 81803540), (2, 40901770), (4, 20450885), (5, 16360708), (7, 11686220), (10, 8180354), (13, 6292580), (14, 5843110), (20, 4090177), (26, 3146290), (28, 2921555), (35, 2337244), (49, 1669460), (52, 1573145), (65, 1258516), (70, 1168622), (91, 898940), (98, 834730), (130, 629258), (140, 584311), (182, 449470), (196, 417365), (245, 333892), (260, 314629), (364, 224735), (455, 179788), (490, 166946), (637, 128420), (910, 89894), (980, 83473), (1274, 64210), (1820, 44947), (2548, 32105), (3185, 25684), (6370, 12842), (6421, 12740)]