21220947

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{467}}^1$

素因数の和:510

約数の個数: 48

約数和(自身を含む): 36796032

約数和(自身を除く): 15575085

約数列:

[1, 3, 9, 11, 17, 27, 33, 51, 81, 99, 153, 187, 243, 297, 459, 467, 561, 891, 1377, 1401, 1683, 2673, 4131, 4203, 5049, 5137, 7939, 12609, 15147, 15411, 23817, 37827, 45441, 46233, 71451, 87329, 113481, 138699, 214353, 261987, 416097, 643059, 785961, 1248291, 1929177, 2357883, 7073649, 21220947]

約数ペア:

[(1, 21220947), (3, 7073649), (9, 2357883), (11, 1929177), (17, 1248291), (27, 785961), (33, 643059), (51, 416097), (81, 261987), (99, 214353), (153, 138699), (187, 113481), (243, 87329), (297, 71451), (459, 46233), (467, 45441), (561, 37827), (891, 23817), (1377, 15411), (1401, 15147), (1683, 12609), (2673, 7939), (4131, 5137), (4203, 5049)]