20645289

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7621}}^1$

素因数の和:7677

約数の個数: 24

約数和(自身を含む): 34878272

約数和(自身を除く): 14232983

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7621, 22863, 53347, 68589, 160041, 327703, 480123, 983109, 2293921, 2949327, 6881763, 20645289]

約数ペア:

[(1, 20645289), (3, 6881763), (7, 2949327), (9, 2293921), (21, 983109), (43, 480123), (63, 327703), (129, 160041), (301, 68589), (387, 53347), (903, 22863), (2709, 7621)]