21828681

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{11177}}^1$

素因数の和:11221

約数の個数: 24

約数和(自身を含む): 37200384

約数和(自身を除く): 15371703

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 11177, 33531, 78239, 100593, 234717, 346487, 704151, 1039461, 2425409, 3118383, 7276227, 21828681]

約数ペア:

[(1, 21828681), (3, 7276227), (7, 3118383), (9, 2425409), (21, 1039461), (31, 704151), (63, 346487), (93, 234717), (217, 100593), (279, 78239), (651, 33531), (1953, 11177)]