21320955

素因数分解:

$3^3\times 5^1\times {\mathrm{157933}}^1$

素因数の和:157947

約数の個数: 16

約数和(自身を含む): 37904160

約数和(自身を除く): 16583205

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157933, 473799, 789665, 1421397, 2368995, 4264191, 7106985, 21320955]

約数ペア:

[(1, 21320955), (3, 7106985), (5, 4264191), (9, 2368995), (15, 1421397), (27, 789665), (45, 473799), (135, 157933)]