21003333

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{3931}}^1$

素因数の和:4084

約数の個数: 16

約数和(自身を含む): 30386496

約数和(自身を除く): 9383163

約数列:

[1, 3, 13, 39, 137, 411, 1781, 3931, 5343, 11793, 51103, 153309, 538547, 1615641, 7001111, 21003333]

約数ペア:

[(1, 21003333), (3, 7001111), (13, 1615641), (39, 538547), (137, 153309), (411, 51103), (1781, 11793), (3931, 5343)]