21340809

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2437}}^1$

素因数の和:2589

約数の個数: 24

約数和(自身を含む): 35497280

約数和(自身を除く): 14156471

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2437, 2919, 7311, 8757, 17059, 21933, 51177, 153531, 338743, 1016229, 2371201, 3048687, 7113603, 21340809]

約数ペア:

[(1, 21340809), (3, 7113603), (7, 3048687), (9, 2371201), (21, 1016229), (63, 338743), (139, 153531), (417, 51177), (973, 21933), (1251, 17059), (2437, 8757), (2919, 7311)]