21689349

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{12401}}^1$

素因数の和:12468

約数の個数: 16

約数和(自身を含む): 32145984

約数和(自身を除く): 10456635

約数列:

[1, 3, 11, 33, 53, 159, 583, 1749, 12401, 37203, 136411, 409233, 657253, 1971759, 7229783, 21689349]

約数ペア:

[(1, 21689349), (3, 7229783), (11, 1971759), (33, 657253), (53, 409233), (159, 136411), (583, 37203), (1749, 12401)]