81486340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313409}}^1$

素因数の和:313431

約数の個数: 24

約数和(自身を含む): 184285080

約数和(自身を除く): 102798740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313409, 626818, 1253636, 1567045, 3134090, 4074317, 6268180, 8148634, 16297268, 20371585, 40743170, 81486340]

約数ペア:

[(1, 81486340), (2, 40743170), (4, 20371585), (5, 16297268), (10, 8148634), (13, 6268180), (20, 4074317), (26, 3134090), (52, 1567045), (65, 1253636), (130, 626818), (260, 313409)]