21498320

素因数分解:

$2^4\times 5^1\times {\mathrm{268729}}^1$

素因数の和:268742

約数の個数: 20

約数和(自身を含む): 49983780

約数和(自身を除く): 28485460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268729, 537458, 1074916, 1343645, 2149832, 2687290, 4299664, 5374580, 10749160, 21498320]

約数ペア:

[(1, 21498320), (2, 10749160), (4, 5374580), (5, 4299664), (8, 2687290), (10, 2149832), (16, 1343645), (20, 1074916), (40, 537458), (80, 268729)]