21400756

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{563}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 43775424

約数和(自身を除く): 22374668

約数列:

[1, 2, 4, 13, 17, 26, 34, 43, 52, 68, 86, 172, 221, 442, 559, 563, 731, 884, 1118, 1126, 1462, 2236, 2252, 2924, 7319, 9503, 9571, 14638, 19006, 19142, 24209, 29276, 38012, 38284, 48418, 96836, 124423, 248846, 314717, 411553, 497692, 629434, 823106, 1258868, 1646212, 5350189, 10700378, 21400756]

約数ペア:

[(1, 21400756), (2, 10700378), (4, 5350189), (13, 1646212), (17, 1258868), (26, 823106), (34, 629434), (43, 497692), (52, 411553), (68, 314717), (86, 248846), (172, 124423), (221, 96836), (442, 48418), (559, 38284), (563, 38012), (731, 29276), (884, 24209), (1118, 19142), (1126, 19006), (1462, 14638), (2236, 9571), (2252, 9503), (2924, 7319)]