21308329

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1223}}^1$

素因数の和:1380

約数の個数: 16

約数和(自身を含む): 25850880

約数和(自身を除く): 4542551

約数列:

[1, 7, 19, 131, 133, 917, 1223, 2489, 8561, 17423, 23237, 160213, 162659, 1121491, 3044047, 21308329]

約数ペア:

[(1, 21308329), (7, 3044047), (19, 1121491), (131, 162659), (133, 160213), (917, 23237), (1223, 17423), (2489, 8561)]