21115989

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1747}}^1$

素因数の和:1849

約数の個数: 24

約数和(自身を含む): 32722560

約数和(自身を除く): 11606571

約数列:

[1, 3, 9, 17, 51, 79, 153, 237, 711, 1343, 1747, 4029, 5241, 12087, 15723, 29699, 89097, 138013, 267291, 414039, 1242117, 2346221, 7038663, 21115989]

約数ペア:

[(1, 21115989), (3, 7038663), (9, 2346221), (17, 1242117), (51, 414039), (79, 267291), (153, 138013), (237, 89097), (711, 29699), (1343, 15723), (1747, 12087), (4029, 5241)]