81521240

素因数分解:

$2^3\times 5^1\times {\mathrm{2038031}}^1$

素因数の和:2038042

約数の個数: 16

約数和(自身を含む): 183422880

約数和(自身を除く): 101901640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2038031, 4076062, 8152124, 10190155, 16304248, 20380310, 40760620, 81521240]

約数ペア:

[(1, 81521240), (2, 40760620), (4, 20380310), (5, 16304248), (8, 10190155), (10, 8152124), (20, 4076062), (40, 2038031)]