21124557

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{23}}^2\times {\mathrm{29}}^1$

素因数の和:104

約数の個数: 60

約数和(自身を含む): 36133020

約数和(自身を除く): 15008463

約数列:

[1, 3, 9, 17, 23, 27, 29, 51, 69, 81, 87, 153, 207, 261, 391, 459, 493, 529, 621, 667, 783, 1173, 1377, 1479, 1587, 1863, 2001, 2349, 3519, 4437, 4761, 6003, 8993, 10557, 11339, 13311, 14283, 15341, 18009, 26979, 31671, 34017, 39933, 42849, 46023, 54027, 80937, 102051, 138069, 242811, 260797, 306153, 414207, 728433, 782391, 918459, 1242621, 2347173, 7041519, 21124557]

約数ペア:

[(1, 21124557), (3, 7041519), (9, 2347173), (17, 1242621), (23, 918459), (27, 782391), (29, 728433), (51, 414207), (69, 306153), (81, 260797), (87, 242811), (153, 138069), (207, 102051), (261, 80937), (391, 54027), (459, 46023), (493, 42849), (529, 39933), (621, 34017), (667, 31671), (783, 26979), (1173, 18009), (1377, 15341), (1479, 14283), (1587, 13311), (1863, 11339), (2001, 10557), (2349, 8993), (3519, 6003), (4437, 4761)]