20996728

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{911}}^1$

素因数の和:1027

約数の個数: 32

約数和(自身を含む): 40930560

約数和(自身を除く): 19933832

約数列:

[1, 2, 4, 8, 43, 67, 86, 134, 172, 268, 344, 536, 911, 1822, 2881, 3644, 5762, 7288, 11524, 23048, 39173, 61037, 78346, 122074, 156692, 244148, 313384, 488296, 2624591, 5249182, 10498364, 20996728]

約数ペア:

[(1, 20996728), (2, 10498364), (4, 5249182), (8, 2624591), (43, 488296), (67, 313384), (86, 244148), (134, 156692), (172, 122074), (268, 78346), (344, 61037), (536, 39173), (911, 23048), (1822, 11524), (2881, 7288), (3644, 5762)]