21078784

素因数分解:

$2^8\times {\mathrm{82339}}^1$

素因数の和:82355

約数の個数: 18

約数和(自身を含む): 42075740

約数和(自身を除く): 20996956

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 82339, 164678, 329356, 658712, 1317424, 2634848, 5269696, 10539392, 21078784]

約数ペア:

[(1, 21078784), (2, 10539392), (4, 5269696), (8, 2634848), (16, 1317424), (32, 658712), (64, 329356), (128, 164678), (256, 82339)]