20958730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{161221}}^1$

素因数の和:161241

約数の個数: 16

約数和(自身を含む): 40627944

約数和(自身を除く): 19669214

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 161221, 322442, 806105, 1612210, 2095873, 4191746, 10479365, 20958730]

約数ペア:

[(1, 20958730), (2, 10479365), (5, 4191746), (10, 2095873), (13, 1612210), (26, 806105), (65, 322442), (130, 161221)]