28129761

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:395

約数の個数: 40

約数和(自身を含む): 46382688

約数和(自身を除く): 18252927

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 131, 241, 297, 393, 723, 891, 1179, 1441, 2169, 2651, 3537, 4323, 6507, 7953, 10611, 12969, 19521, 23859, 31571, 38907, 71577, 94713, 116721, 214731, 284139, 347281, 852417, 1041843, 2557251, 3125529, 9376587, 28129761]

約数ペア:

[(1, 28129761), (3, 9376587), (9, 3125529), (11, 2557251), (27, 1041843), (33, 852417), (81, 347281), (99, 284139), (131, 214731), (241, 116721), (297, 94713), (393, 71577), (723, 38907), (891, 31571), (1179, 23859), (1441, 19521), (2169, 12969), (2651, 10611), (3537, 7953), (4323, 6507)]