20258756

素因数分解:

$2^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{2521}}^1$

素因数の和:2580

約数の個数: 36

約数和(自身を含む): 42263676

約数和(自身を除く): 22004920

約数列:

[1, 2, 4, 7, 14, 28, 41, 49, 82, 98, 164, 196, 287, 574, 1148, 2009, 2521, 4018, 5042, 8036, 10084, 17647, 35294, 70588, 103361, 123529, 206722, 247058, 413444, 494116, 723527, 1447054, 2894108, 5064689, 10129378, 20258756]

約数ペア:

[(1, 20258756), (2, 10129378), (4, 5064689), (7, 2894108), (14, 1447054), (28, 723527), (41, 494116), (49, 413444), (82, 247058), (98, 206722), (164, 123529), (196, 103361), (287, 70588), (574, 35294), (1148, 17647), (2009, 10084), (2521, 8036), (4018, 5042)]