25990209

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{6763}}^1$

素因数の和:6837

約数の個数: 24

約数和(自身を含む): 43614272

約数和(自身を除く): 17624063

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 6763, 20289, 47341, 60867, 142023, 412543, 426069, 1237629, 2887801, 3712887, 8663403, 25990209]

約数ペア:

[(1, 25990209), (3, 8663403), (7, 3712887), (9, 2887801), (21, 1237629), (61, 426069), (63, 412543), (183, 142023), (427, 60867), (549, 47341), (1281, 20289), (3843, 6763)]