2781999

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:85

約数の個数: 64

約数和(自身を含む): 5184000

約数和(自身を除く): 2402001

約数列:

[1, 3, 9, 11, 17, 19, 27, 29, 33, 51, 57, 87, 99, 153, 171, 187, 209, 261, 297, 319, 323, 459, 493, 513, 551, 561, 627, 783, 957, 969, 1479, 1653, 1683, 1881, 2871, 2907, 3553, 4437, 4959, 5049, 5423, 5643, 6061, 8613, 8721, 9367, 10659, 13311, 14877, 16269, 18183, 28101, 31977, 48807, 54549, 84303, 95931, 103037, 146421, 163647, 252909, 309111, 927333, 2781999]

約数ペア:

[(1, 2781999), (3, 927333), (9, 309111), (11, 252909), (17, 163647), (19, 146421), (27, 103037), (29, 95931), (33, 84303), (51, 54549), (57, 48807), (87, 31977), (99, 28101), (153, 18183), (171, 16269), (187, 14877), (209, 13311), (261, 10659), (297, 9367), (319, 8721), (323, 8613), (459, 6061), (493, 5643), (513, 5423), (551, 5049), (561, 4959), (627, 4437), (783, 3553), (957, 2907), (969, 2871), (1479, 1881), (1653, 1683)]