20847561

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{23087}}^1$

素因数の和:23140

約数の個数: 16

約数和(自身を含む): 32507904

約数和(自身を除く): 11660343

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 23087, 69261, 161609, 484827, 992741, 2978223, 6949187, 20847561]

約数ペア:

[(1, 20847561), (3, 6949187), (7, 2978223), (21, 992741), (43, 484827), (129, 161609), (301, 69261), (903, 23087)]