21016508

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 40656000

約数和(自身を除く): 19639492

約数列:

[1, 2, 4, 19, 38, 43, 59, 76, 86, 109, 118, 172, 218, 236, 436, 817, 1121, 1634, 2071, 2242, 2537, 3268, 4142, 4484, 4687, 5074, 6431, 8284, 9374, 10148, 12862, 18748, 25724, 48203, 89053, 96406, 122189, 178106, 192812, 244378, 276533, 356212, 488756, 553066, 1106132, 5254127, 10508254, 21016508]

約数ペア:

[(1, 21016508), (2, 10508254), (4, 5254127), (19, 1106132), (38, 553066), (43, 488756), (59, 356212), (76, 276533), (86, 244378), (109, 192812), (118, 178106), (172, 122189), (218, 96406), (236, 89053), (436, 48203), (817, 25724), (1121, 18748), (1634, 12862), (2071, 10148), (2242, 9374), (2537, 8284), (3268, 6431), (4142, 5074), (4484, 4687)]