21490491

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{277}}^1\times {\mathrm{2351}}^1$

素因数の和:2642

約数の個数: 16

約数和(自身を含む): 31385088

約数和(自身を除く): 9894597

約数列:

[1, 3, 11, 33, 277, 831, 2351, 3047, 7053, 9141, 25861, 77583, 651227, 1953681, 7163497, 21490491]

約数ペア:

[(1, 21490491), (3, 7163497), (11, 1953681), (33, 651227), (277, 77583), (831, 25861), (2351, 9141), (3047, 7053)]