81284960

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12391}}^1$

素因数の和:12447

約数の個数: 48

約数和(自身を含む): 196735392

約数和(自身を除く): 115450432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3280, 6560, 12391, 24782, 49564, 61955, 99128, 123910, 198256, 247820, 396512, 495640, 508031, 991280, 1016062, 1982560, 2032124, 2540155, 4064248, 5080310, 8128496, 10160620, 16256992, 20321240, 40642480, 81284960]

約数ペア:

[(1, 81284960), (2, 40642480), (4, 20321240), (5, 16256992), (8, 10160620), (10, 8128496), (16, 5080310), (20, 4064248), (32, 2540155), (40, 2032124), (41, 1982560), (80, 1016062), (82, 991280), (160, 508031), (164, 495640), (205, 396512), (328, 247820), (410, 198256), (656, 123910), (820, 99128), (1312, 61955), (1640, 49564), (3280, 24782), (6560, 12391)]