21609765

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20879}}^1$

素因数の和:20913

約数の個数: 24

約数和(自身を含む): 39087360

約数和(自身を除く): 17477595

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20879, 62637, 104395, 187911, 313185, 480217, 939555, 1440651, 2401085, 4321953, 7203255, 21609765]

約数ペア:

[(1, 21609765), (3, 7203255), (5, 4321953), (9, 2401085), (15, 1440651), (23, 939555), (45, 480217), (69, 313185), (115, 187911), (207, 104395), (345, 62637), (1035, 20879)]