20489756

素因数分解:

$2^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 42470400

約数和(自身を除く): 21980644

約数列:

[1, 2, 4, 7, 14, 28, 59, 79, 118, 157, 158, 236, 314, 316, 413, 553, 628, 826, 1099, 1106, 1652, 2198, 2212, 4396, 4661, 9263, 9322, 12403, 18526, 18644, 24806, 32627, 37052, 49612, 64841, 65254, 86821, 129682, 130508, 173642, 259364, 347284, 731777, 1463554, 2927108, 5122439, 10244878, 20489756]

約数ペア:

[(1, 20489756), (2, 10244878), (4, 5122439), (7, 2927108), (14, 1463554), (28, 731777), (59, 347284), (79, 259364), (118, 173642), (157, 130508), (158, 129682), (236, 86821), (314, 65254), (316, 64841), (413, 49612), (553, 37052), (628, 32627), (826, 24806), (1099, 18644), (1106, 18526), (1652, 12403), (2198, 9322), (2212, 9263), (4396, 4661)]