21878529

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{5471}}^1$

素因数の和:5548

約数の個数: 16

約数和(自身を含む): 30818304

約数和(自身を除く): 8939775

約数列:

[1, 3, 31, 43, 93, 129, 1333, 3999, 5471, 16413, 169601, 235253, 508803, 705759, 7292843, 21878529]

約数ペア:

[(1, 21878529), (3, 7292843), (31, 705759), (43, 508803), (93, 235253), (129, 169601), (1333, 16413), (3999, 5471)]