21009537

素因数分解:

$3^5\times {\mathrm{31}}^1\times {\mathrm{2789}}^1$

素因数の和:2835

約数の個数: 24

約数和(自身を含む): 32497920

約数和(自身を除く): 11488383

約数列:

[1, 3, 9, 27, 31, 81, 93, 243, 279, 837, 2511, 2789, 7533, 8367, 25101, 75303, 86459, 225909, 259377, 677727, 778131, 2334393, 7003179, 21009537]

約数ペア:

[(1, 21009537), (3, 7003179), (9, 2334393), (27, 778131), (31, 677727), (81, 259377), (93, 225909), (243, 86459), (279, 75303), (837, 25101), (2511, 8367), (2789, 7533)]