20778254

素因数分解:

$2^1\times 7^4\times {\mathrm{4327}}^1$

素因数の和:4357

約数の個数: 20

約数和(自身を含む): 36368184

約数和(自身を除く): 15589930

約数列:

[1, 2, 7, 14, 49, 98, 343, 686, 2401, 4327, 4802, 8654, 30289, 60578, 212023, 424046, 1484161, 2968322, 10389127, 20778254]

約数ペア:

[(1, 20778254), (2, 10389127), (7, 2968322), (14, 1484161), (49, 424046), (98, 212023), (343, 60578), (686, 30289), (2401, 8654), (4327, 4802)]