20642188

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{17981}}^1$

素因数の和:18033

約数の個数: 24

約数和(自身を含む): 42293664

約数和(自身を除く): 21651476

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 17981, 35962, 71924, 125867, 251734, 503468, 737221, 1474442, 2948884, 5160547, 10321094, 20642188]

約数ペア:

[(1, 20642188), (2, 10321094), (4, 5160547), (7, 2948884), (14, 1474442), (28, 737221), (41, 503468), (82, 251734), (164, 125867), (287, 71924), (574, 35962), (1148, 17981)]