81539560

素因数分解:

$2^3\times 5^1\times {\mathrm{1291}}^1\times {\mathrm{1579}}^1$

素因数の和:2881

約数の個数: 32

約数和(自身を含む): 183722400

約数和(自身を除く): 102182840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1291, 1579, 2582, 3158, 5164, 6316, 6455, 7895, 10328, 12632, 12910, 15790, 25820, 31580, 51640, 63160, 2038489, 4076978, 8153956, 10192445, 16307912, 20384890, 40769780, 81539560]

約数ペア:

[(1, 81539560), (2, 40769780), (4, 20384890), (5, 16307912), (8, 10192445), (10, 8153956), (20, 4076978), (40, 2038489), (1291, 63160), (1579, 51640), (2582, 31580), (3158, 25820), (5164, 15790), (6316, 12910), (6455, 12632), (7895, 10328)]