81604360

素因数分解:

$2^3\times 5^1\times {\mathrm{2040109}}^1$

素因数の和:2040120

約数の個数: 16

約数和(自身を含む): 183609900

約数和(自身を除く): 102005540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040109, 4080218, 8160436, 10200545, 16320872, 20401090, 40802180, 81604360]

約数ペア:

[(1, 81604360), (2, 40802180), (4, 20401090), (5, 16320872), (8, 10200545), (10, 8160436), (20, 4080218), (40, 2040109)]