21135809

素因数分解:

${\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:568

約数の個数: 16

約数和(自身を含む): 23328000

約数和(自身を除く): 2192191

約数列:

[1, 19, 29, 89, 431, 551, 1691, 2581, 8189, 12499, 38359, 49039, 237481, 728821, 1112411, 21135809]

約数ペア:

[(1, 21135809), (19, 1112411), (29, 728821), (89, 237481), (431, 49039), (551, 38359), (1691, 12499), (2581, 8189)]