21438999

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4339}}^1$

素因数の和:4412

約数の個数: 20

約数和(自身を含む): 32558680

約数和(自身を除く): 11119681

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4339, 4941, 13017, 39051, 117153, 264679, 351459, 794037, 2382111, 7146333, 21438999]

約数ペア:

[(1, 21438999), (3, 7146333), (9, 2382111), (27, 794037), (61, 351459), (81, 264679), (183, 117153), (549, 39051), (1647, 13017), (4339, 4941)]