21561891

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{5167}}^1$

素因数の和:5290

約数の個数: 16

約数和(自身を含む): 31256064

約数和(自身を除く): 9694173

約数列:

[1, 3, 13, 39, 107, 321, 1391, 4173, 5167, 15501, 67171, 201513, 552869, 1658607, 7187297, 21561891]

約数ペア:

[(1, 21561891), (3, 7187297), (13, 1658607), (39, 552869), (107, 201513), (321, 67171), (1391, 15501), (4173, 5167)]