21931263

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42751}}^1$

素因数の和:42779

約数の個数: 16

約数和(自身を含む): 34201600

約数和(自身を除く): 12270337

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42751, 128253, 384759, 812269, 1154277, 2436807, 7310421, 21931263]

約数ペア:

[(1, 21931263), (3, 7310421), (9, 2436807), (19, 1154277), (27, 812269), (57, 384759), (171, 128253), (513, 42751)]