30720879

素因数分解:

$3^2\times 7^1\times {\mathrm{569}}^1\times {\mathrm{857}}^1$

素因数の和:1439

約数の個数: 24

約数和(自身を含む): 50862240

約数和(自身を除く): 20141361

約数列:

[1, 3, 7, 9, 21, 63, 569, 857, 1707, 2571, 3983, 5121, 5999, 7713, 11949, 17997, 35847, 53991, 487633, 1462899, 3413431, 4388697, 10240293, 30720879]

約数ペア:

[(1, 30720879), (3, 10240293), (7, 4388697), (9, 3413431), (21, 1462899), (63, 487633), (569, 53991), (857, 35847), (1707, 17997), (2571, 11949), (3983, 7713), (5121, 5999)]