78992020

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{21821}}^1$

素因数の和:22011

約数の個数: 24

約数和(自身を含む): 166807368

約数和(自身を除く): 87815348

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 21821, 43642, 87284, 109105, 218210, 436420, 3949601, 7899202, 15798404, 19748005, 39496010, 78992020]

約数ペア:

[(1, 78992020), (2, 39496010), (4, 19748005), (5, 15798404), (10, 7899202), (20, 3949601), (181, 436420), (362, 218210), (724, 109105), (905, 87284), (1810, 43642), (3620, 21821)]