21026421

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{6197}}^1$

素因数の和:6245

約数の個数: 24

約数和(自身を含む): 33841080

約数和(自身を除く): 12814659

約数列:

[1, 3, 9, 13, 29, 39, 87, 117, 261, 377, 1131, 3393, 6197, 18591, 55773, 80561, 179713, 241683, 539139, 725049, 1617417, 2336269, 7008807, 21026421]

約数ペア:

[(1, 21026421), (3, 7008807), (9, 2336269), (13, 1617417), (29, 725049), (39, 539139), (87, 241683), (117, 179713), (261, 80561), (377, 55773), (1131, 18591), (3393, 6197)]