20757561

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{227}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 32306688

約数和(自身を除く): 11549127

約数列:

[1, 3, 11, 17, 33, 51, 163, 187, 227, 489, 561, 681, 1793, 2497, 2771, 3859, 5379, 7491, 8313, 11577, 30481, 37001, 42449, 91443, 111003, 127347, 407011, 629017, 1221033, 1887051, 6919187, 20757561]

約数ペア:

[(1, 20757561), (3, 6919187), (11, 1887051), (17, 1221033), (33, 629017), (51, 407011), (163, 127347), (187, 111003), (227, 91443), (489, 42449), (561, 37001), (681, 30481), (1793, 11577), (2497, 8313), (2771, 7491), (3859, 5379)]