20781612

素因数分解:

$2^2\times 3^2\times {\mathrm{139}}^1\times {\mathrm{4153}}^1$

素因数の和:4302

約数の個数: 36

約数和(自身を含む): 52921960

約数和(自身を除く): 32140348

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 139, 278, 417, 556, 834, 1251, 1668, 2502, 4153, 5004, 8306, 12459, 16612, 24918, 37377, 49836, 74754, 149508, 577267, 1154534, 1731801, 2309068, 3463602, 5195403, 6927204, 10390806, 20781612]

約数ペア:

[(1, 20781612), (2, 10390806), (3, 6927204), (4, 5195403), (6, 3463602), (9, 2309068), (12, 1731801), (18, 1154534), (36, 577267), (139, 149508), (278, 74754), (417, 49836), (556, 37377), (834, 24918), (1251, 16612), (1668, 12459), (2502, 8306), (4153, 5004)]