21530873

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{1061}}^1$

素因数の和:1304

約数の個数: 16

約数和(自身を含む): 26643456

約数和(自身を除く): 5112583

約数列:

[1, 7, 13, 91, 223, 1061, 1561, 2899, 7427, 13793, 20293, 96551, 236603, 1656221, 3075839, 21530873]

約数ペア:

[(1, 21530873), (7, 3075839), (13, 1656221), (91, 236603), (223, 96551), (1061, 20293), (1561, 13793), (2899, 7427)]