161221520

素因数分解:

$2^4\times 5^1\times {\mathrm{2015269}}^1$

素因数の和:2015282

約数の個数: 20

約数和(自身を含む): 374840220

約数和(自身を除く): 213618700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2015269, 4030538, 8061076, 10076345, 16122152, 20152690, 32244304, 40305380, 80610760, 161221520]

約数ペア:

[(1, 161221520), (2, 80610760), (4, 40305380), (5, 32244304), (8, 20152690), (10, 16122152), (16, 10076345), (20, 8061076), (40, 4030538), (80, 2015269)]