21057213

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{3863}}^1$

素因数の和:3968

約数の個数: 16

約数和(自身を含む): 29675520

約数和(自身を除く): 8618307

約数列:

[1, 3, 23, 69, 79, 237, 1817, 3863, 5451, 11589, 88849, 266547, 305177, 915531, 7019071, 21057213]

約数ペア:

[(1, 21057213), (3, 7019071), (23, 915531), (69, 305177), (79, 266547), (237, 88849), (1817, 11589), (3863, 5451)]