128415231

素因数分解:

$3^2\times 7^2\times {\mathrm{291191}}^1$

素因数の和:291211

約数の個数: 18

約数和(自身を含む): 215773272

約数和(自身を除く): 87358041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 291191, 873573, 2038337, 2620719, 6115011, 14268359, 18345033, 42805077, 128415231]

約数ペア:

[(1, 128415231), (3, 42805077), (7, 18345033), (9, 14268359), (21, 6115011), (49, 2620719), (63, 2038337), (147, 873573), (441, 291191)]