21699009

素因数分解:

$3^4\times {\mathrm{79}}^1\times {\mathrm{3391}}^1$

素因数の和:3482

約数の個数: 20

約数和(自身を含む): 32834560

約数和(自身を除く): 11135551

約数列:

[1, 3, 9, 27, 79, 81, 237, 711, 2133, 3391, 6399, 10173, 30519, 91557, 267889, 274671, 803667, 2411001, 7233003, 21699009]

約数ペア:

[(1, 21699009), (3, 7233003), (9, 2411001), (27, 803667), (79, 274671), (81, 267889), (237, 91557), (711, 30519), (2133, 10173), (3391, 6399)]