20818918

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1\times {\mathrm{821}}^1$

素因数の和:1263

約数の個数: 16

約数和(自身を含む): 32353920

約数和(自身を除く): 11535002

約数列:

[1, 2, 31, 62, 409, 818, 821, 1642, 12679, 25358, 25451, 50902, 335789, 671578, 10409459, 20818918]

約数ペア:

[(1, 20818918), (2, 10409459), (31, 671578), (62, 335789), (409, 50902), (818, 25451), (821, 25358), (1642, 12679)]