21400389

素因数分解:

$3^3\times {\mathrm{79}}^2\times {\mathrm{127}}^1$

素因数の和:294

約数の個数: 24

約数和(自身を含む): 32363520

約数和(自身を除く): 10963131

約数列:

[1, 3, 9, 27, 79, 127, 237, 381, 711, 1143, 2133, 3429, 6241, 10033, 18723, 30099, 56169, 90297, 168507, 270891, 792607, 2377821, 7133463, 21400389]

約数ペア:

[(1, 21400389), (3, 7133463), (9, 2377821), (27, 792607), (79, 270891), (127, 168507), (237, 90297), (381, 56169), (711, 30099), (1143, 18723), (2133, 10033), (3429, 6241)]