81126440

素因数分解:

$2^3\times 5^1\times {\mathrm{1291}}^1\times {\mathrm{1571}}^1$

素因数の和:2873

約数の個数: 32

約数和(自身を含む): 182792160

約数和(自身を除く): 101665720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1291, 1571, 2582, 3142, 5164, 6284, 6455, 7855, 10328, 12568, 12910, 15710, 25820, 31420, 51640, 62840, 2028161, 4056322, 8112644, 10140805, 16225288, 20281610, 40563220, 81126440]

約数ペア:

[(1, 81126440), (2, 40563220), (4, 20281610), (5, 16225288), (8, 10140805), (10, 8112644), (20, 4056322), (40, 2028161), (1291, 62840), (1571, 51640), (2582, 31420), (3142, 25820), (5164, 15710), (6284, 12910), (6455, 12568), (7855, 10328)]