20817555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1777}}^1$

素因数の和:1867

約数の個数: 32

約数和(自身を含む): 36868608

約数和(自身を除く): 16051053

約数列:

[1, 3, 5, 11, 15, 33, 55, 71, 165, 213, 355, 781, 1065, 1777, 2343, 3905, 5331, 8885, 11715, 19547, 26655, 58641, 97735, 126167, 293205, 378501, 630835, 1387837, 1892505, 4163511, 6939185, 20817555]

約数ペア:

[(1, 20817555), (3, 6939185), (5, 4163511), (11, 1892505), (15, 1387837), (33, 630835), (55, 378501), (71, 293205), (165, 126167), (213, 97735), (355, 58641), (781, 26655), (1065, 19547), (1777, 11715), (2343, 8885), (3905, 5331)]