21397581

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{21419}}^1$

素因数の和:21465

約数の個数: 16

約数和(自身を含む): 32558400

約数和(自身を除く): 11160819

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 21419, 64257, 192771, 578313, 792503, 2377509, 7132527, 21397581]

約数ペア:

[(1, 21397581), (3, 7132527), (9, 2377509), (27, 792503), (37, 578313), (111, 192771), (333, 64257), (999, 21419)]