21127311

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{229}}^1$

素因数の和:325

約数の個数: 40

約数和(自身を含む): 34063920

約数和(自身を除く): 12936609

約数列:

[1, 3, 9, 17, 27, 51, 67, 81, 153, 201, 229, 459, 603, 687, 1139, 1377, 1809, 2061, 3417, 3893, 5427, 6183, 10251, 11679, 15343, 18549, 30753, 35037, 46029, 92259, 105111, 138087, 260831, 315333, 414261, 782493, 1242783, 2347479, 7042437, 21127311]

約数ペア:

[(1, 21127311), (3, 7042437), (9, 2347479), (17, 1242783), (27, 782493), (51, 414261), (67, 315333), (81, 260831), (153, 138087), (201, 105111), (229, 92259), (459, 46029), (603, 35037), (687, 30753), (1139, 18549), (1377, 15343), (1809, 11679), (2061, 10251), (3417, 6183), (3893, 5427)]