21209877

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{60427}}^1$

素因数の和:60449

約数の個数: 16

約数和(自身を含む): 33839680

約数和(自身を除く): 12629803

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 60427, 181281, 543843, 785551, 1631529, 2356653, 7069959, 21209877]

約数ペア:

[(1, 21209877), (3, 7069959), (9, 2356653), (13, 1631529), (27, 785551), (39, 543843), (117, 181281), (351, 60427)]