21528663

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17807}}^1$

素因数の和:17854

約数の個数: 16

約数和(自身を含む): 31911936

約数和(自身を除く): 10383273

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17807, 53421, 231491, 552017, 694473, 1656051, 7176221, 21528663]

約数ペア:

[(1, 21528663), (3, 7176221), (13, 1656051), (31, 694473), (39, 552017), (93, 231491), (403, 53421), (1209, 17807)]