21655323

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:508

約数の個数: 32

約数和(自身を含む): 33652800

約数和(自身を除く): 11997477

約数列:

[1, 3, 9, 27, 37, 53, 111, 159, 333, 409, 477, 999, 1227, 1431, 1961, 3681, 5883, 11043, 15133, 17649, 21677, 45399, 52947, 65031, 136197, 195093, 408591, 585279, 802049, 2406147, 7218441, 21655323]

約数ペア:

[(1, 21655323), (3, 7218441), (9, 2406147), (27, 802049), (37, 585279), (53, 408591), (111, 195093), (159, 136197), (333, 65031), (409, 52947), (477, 45399), (999, 21677), (1227, 17649), (1431, 15133), (1961, 11043), (3681, 5883)]