20538868

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{17891}}^1$

素因数の和:17943

約数の個数: 24

約数和(自身を含む): 42081984

約数和(自身を除く): 21543116

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 17891, 35782, 71564, 125237, 250474, 500948, 733531, 1467062, 2934124, 5134717, 10269434, 20538868]

約数ペア:

[(1, 20538868), (2, 10269434), (4, 5134717), (7, 2934124), (14, 1467062), (28, 733531), (41, 500948), (82, 250474), (164, 125237), (287, 71564), (574, 35782), (1148, 17891)]