20129805

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 36406656

約数和(自身を除く): 16276851

約数列:

[1, 3, 5, 9, 15, 43, 45, 101, 103, 129, 215, 303, 309, 387, 505, 515, 645, 909, 927, 1515, 1545, 1935, 4343, 4429, 4545, 4635, 10403, 13029, 13287, 21715, 22145, 31209, 39087, 39861, 52015, 65145, 66435, 93627, 156045, 195435, 199305, 447329, 468135, 1341987, 2236645, 4025961, 6709935, 20129805]

約数ペア:

[(1, 20129805), (3, 6709935), (5, 4025961), (9, 2236645), (15, 1341987), (43, 468135), (45, 447329), (101, 199305), (103, 195435), (129, 156045), (215, 93627), (303, 66435), (309, 65145), (387, 52015), (505, 39861), (515, 39087), (645, 31209), (909, 22145), (927, 21715), (1515, 13287), (1545, 13029), (1935, 10403), (4343, 4635), (4429, 4545)]