21170487

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{647}}^1\times {\mathrm{839}}^1$

素因数の和:1502

約数の個数: 16

約数和(自身を含む): 30481920

約数和(自身を除く): 9311433

約数列:

[1, 3, 13, 39, 647, 839, 1941, 2517, 8411, 10907, 25233, 32721, 542833, 1628499, 7056829, 21170487]

約数ペア:

[(1, 21170487), (3, 7056829), (13, 1628499), (39, 542833), (647, 32721), (839, 25233), (1941, 10907), (2517, 8411)]