20391279

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{47}}^2\times {\mathrm{181}}^1$

素因数の和:295

約数の個数: 24

約数和(自身を含む): 29575728

約数和(自身を除く): 9184449

約数列:

[1, 3, 17, 47, 51, 141, 181, 543, 799, 2209, 2397, 3077, 6627, 8507, 9231, 25521, 37553, 112659, 144619, 399829, 433857, 1199487, 6797093, 20391279]

約数ペア:

[(1, 20391279), (3, 6797093), (17, 1199487), (47, 433857), (51, 399829), (141, 144619), (181, 112659), (543, 37553), (799, 25521), (2209, 9231), (2397, 8507), (3077, 6627)]