21985384

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{809}}^1$

素因数の和:937

約数の個数: 32

約数和(自身を含む): 42768000

約数和(自身を除く): 20782616

約数列:

[1, 2, 4, 8, 43, 79, 86, 158, 172, 316, 344, 632, 809, 1618, 3236, 3397, 6472, 6794, 13588, 27176, 34787, 63911, 69574, 127822, 139148, 255644, 278296, 511288, 2748173, 5496346, 10992692, 21985384]

約数ペア:

[(1, 21985384), (2, 10992692), (4, 5496346), (8, 2748173), (43, 511288), (79, 278296), (86, 255644), (158, 139148), (172, 127822), (316, 69574), (344, 63911), (632, 34787), (809, 27176), (1618, 13588), (3236, 6794), (3397, 6472)]