399568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1$

素因数の和:151

約数の個数: 40

約数和(自身を含む): 890568

約数和(自身を除く): 491000

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 113, 136, 208, 221, 226, 272, 442, 452, 884, 904, 1469, 1768, 1808, 1921, 2938, 3536, 3842, 5876, 7684, 11752, 15368, 23504, 24973, 30736, 49946, 99892, 199784, 399568]

約数ペア:

[(1, 399568), (2, 199784), (4, 99892), (8, 49946), (13, 30736), (16, 24973), (17, 23504), (26, 15368), (34, 11752), (52, 7684), (68, 5876), (104, 3842), (113, 3536), (136, 2938), (208, 1921), (221, 1808), (226, 1768), (272, 1469), (442, 904), (452, 884)]