21531879

素因数分解:

$3^3\times {\mathrm{137}}^1\times {\mathrm{5821}}^1$

素因数の和:5967

約数の個数: 16

約数和(自身を含む): 32137440

約数和(自身を除く): 10605561

約数列:

[1, 3, 9, 27, 137, 411, 1233, 3699, 5821, 17463, 52389, 157167, 797477, 2392431, 7177293, 21531879]

約数ペア:

[(1, 21531879), (3, 7177293), (9, 2392431), (27, 797477), (137, 157167), (411, 52389), (1233, 17463), (3699, 5821)]