21021807

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{277}}^1\times {\mathrm{617}}^1$

素因数の和:938

約数の個数: 16

約数和(自身を含む): 28863072

約数和(自身を除く): 7841265

約数列:

[1, 3, 41, 123, 277, 617, 831, 1851, 11357, 25297, 34071, 75891, 170909, 512727, 7007269, 21021807]

約数ペア:

[(1, 21021807), (3, 7007269), (41, 512727), (123, 170909), (277, 75891), (617, 34071), (831, 25297), (1851, 11357)]