21989253

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{51257}}^1$

素因数の和:51284

約数の個数: 16

約数和(自身を含む): 34445376

約数和(自身を除く): 12456123

約数列:

[1, 3, 11, 13, 33, 39, 143, 429, 51257, 153771, 563827, 666341, 1691481, 1999023, 7329751, 21989253]

約数ペア:

[(1, 21989253), (3, 7329751), (11, 1999023), (13, 1691481), (33, 666341), (39, 563827), (143, 153771), (429, 51257)]