21259119

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53281}}^1$

素因数の和:53310

約数の個数: 16

約数和(自身を含む): 34100480

約数和(自身を除く): 12841361

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53281, 159843, 372967, 1012339, 1118901, 3037017, 7086373, 21259119]

約数ペア:

[(1, 21259119), (3, 7086373), (7, 3037017), (19, 1118901), (21, 1012339), (57, 372967), (133, 159843), (399, 53281)]