20686785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{727}}^1$

素因数の和:1013

約数の個数: 32

約数和(自身を含む): 38019072

約数和(自身を除く): 17332287

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 271, 727, 813, 1355, 1897, 2181, 3635, 4065, 5089, 5691, 9485, 10905, 15267, 25445, 28455, 76335, 197017, 591051, 985085, 1379119, 2955255, 4137357, 6895595, 20686785]

約数ペア:

[(1, 20686785), (3, 6895595), (5, 4137357), (7, 2955255), (15, 1379119), (21, 985085), (35, 591051), (105, 197017), (271, 76335), (727, 28455), (813, 25445), (1355, 15267), (1897, 10905), (2181, 9485), (3635, 5691), (4065, 5089)]