639261

素因数分解:

$3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:225

約数の個数: 24

約数和(自身を含む): 1077440

約数和(自身を除く): 438179

約数列:

[1, 3, 7, 9, 21, 63, 73, 139, 219, 417, 511, 657, 973, 1251, 1533, 2919, 4599, 8757, 10147, 30441, 71029, 91323, 213087, 639261]

約数ペア:

[(1, 639261), (3, 213087), (7, 91323), (9, 71029), (21, 30441), (63, 10147), (73, 8757), (139, 4599), (219, 2919), (417, 1533), (511, 1251), (657, 973)]