28705131

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1669}}^1$

素因数の和:1705

約数の個数: 48

約数和(自身を含む): 53306400

約数和(自身を除く): 24601269

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 189, 273, 351, 441, 637, 819, 1323, 1669, 1911, 2457, 5007, 5733, 11683, 15021, 17199, 21697, 35049, 45063, 65091, 81781, 105147, 151879, 195273, 245343, 315441, 455637, 585819, 736029, 1063153, 1366911, 2208087, 3189459, 4100733, 9568377, 28705131]

約数ペア:

[(1, 28705131), (3, 9568377), (7, 4100733), (9, 3189459), (13, 2208087), (21, 1366911), (27, 1063153), (39, 736029), (49, 585819), (63, 455637), (91, 315441), (117, 245343), (147, 195273), (189, 151879), (273, 105147), (351, 81781), (441, 65091), (637, 45063), (819, 35049), (1323, 21697), (1669, 17199), (1911, 15021), (2457, 11683), (5007, 5733)]