21286433

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{199}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 25992000

約数和(自身を除く): 4705567

約数列:

[1, 7, 37, 49, 59, 199, 259, 413, 1393, 1813, 2183, 2891, 7363, 9751, 11741, 15281, 51541, 82187, 106967, 360787, 434417, 575309, 3040919, 21286433]

約数ペア:

[(1, 21286433), (7, 3040919), (37, 575309), (49, 434417), (59, 360787), (199, 106967), (259, 82187), (413, 51541), (1393, 15281), (1813, 11741), (2183, 9751), (2891, 7363)]