28008729

素因数分解:

$3^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{1087}}^1$

素因数の和:1509

約数の個数: 24

約数和(自身を含む): 46392320

約数和(自身を除く): 18383591

約数列:

[1, 3, 7, 9, 21, 63, 409, 1087, 1227, 2863, 3261, 3681, 7609, 8589, 9783, 22827, 25767, 68481, 444583, 1333749, 3112081, 4001247, 9336243, 28008729]

約数ペア:

[(1, 28008729), (3, 9336243), (7, 4001247), (9, 3112081), (21, 1333749), (63, 444583), (409, 68481), (1087, 25767), (1227, 22827), (2863, 9783), (3261, 8589), (3681, 7609)]