20972919

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{4639}}^1$

素因数の和:4790

約数の個数: 16

約数和(自身を含む): 30735360

約数和(自身を除く): 9762441

約数列:

[1, 3, 11, 33, 137, 411, 1507, 4521, 4639, 13917, 51029, 153087, 635543, 1906629, 6990973, 20972919]

約数ペア:

[(1, 20972919), (3, 6990973), (11, 1906629), (33, 635543), (137, 153087), (411, 51029), (1507, 13917), (4521, 4639)]