20619459

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2389}}^1$

素因数の和:2539

約数の個数: 24

約数和(自身を含む): 34301280

約数和(自身を除く): 13681821

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2389, 2877, 7167, 8631, 16723, 21501, 50169, 150507, 327293, 981879, 2291051, 2945637, 6873153, 20619459]

約数ペア:

[(1, 20619459), (3, 6873153), (7, 2945637), (9, 2291051), (21, 981879), (63, 327293), (137, 150507), (411, 50169), (959, 21501), (1233, 16723), (2389, 8631), (2877, 7167)]