21155672

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{64499}}^1$

素因数の和:64546

約数の個数: 16

約数和(自身を含む): 40635000

約数和(自身を除く): 19479328

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 64499, 128998, 257996, 515992, 2644459, 5288918, 10577836, 21155672]

約数ペア:

[(1, 21155672), (2, 10577836), (4, 5288918), (8, 2644459), (41, 515992), (82, 257996), (164, 128998), (328, 64499)]