18875421

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:457

約数の個数: 24

約数和(自身を含む): 28005120

約数和(自身を除く): 9129699

約数列:

[1, 3, 9, 71, 109, 213, 271, 327, 639, 813, 981, 2439, 7739, 19241, 23217, 29539, 57723, 69651, 88617, 173169, 265851, 2097269, 6291807, 18875421]

約数ペア:

[(1, 18875421), (3, 6291807), (9, 2097269), (71, 265851), (109, 173169), (213, 88617), (271, 69651), (327, 57723), (639, 29539), (813, 23217), (981, 19241), (2439, 7739)]