20993895

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2111}}^1$

素因数の和:2152

約数の個数: 48

約数和(自身を含む): 41513472

約数和(自身を除く): 20519577

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2111, 3315, 6333, 9945, 10555, 18999, 27443, 31665, 35887, 82329, 94995, 107661, 137215, 179435, 246987, 322983, 411645, 466531, 538305, 1234935, 1399593, 1614915, 2332655, 4198779, 6997965, 20993895]

約数ペア:

[(1, 20993895), (3, 6997965), (5, 4198779), (9, 2332655), (13, 1614915), (15, 1399593), (17, 1234935), (39, 538305), (45, 466531), (51, 411645), (65, 322983), (85, 246987), (117, 179435), (153, 137215), (195, 107661), (221, 94995), (255, 82329), (585, 35887), (663, 31665), (765, 27443), (1105, 18999), (1989, 10555), (2111, 9945), (3315, 6333)]