21039109

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{5639}}^1$

素因数の和:5700

約数の個数: 16

約数和(自身を含む): 26530560

約数和(自身を除く): 5491451

約数列:

[1, 7, 13, 41, 91, 287, 533, 3731, 5639, 39473, 73307, 231199, 513149, 1618393, 3005587, 21039109]

約数ペア:

[(1, 21039109), (7, 3005587), (13, 1618393), (41, 513149), (91, 231199), (287, 73307), (533, 39473), (3731, 5639)]