21098320

素因数分解:

$2^4\times 5^1\times {\mathrm{263729}}^1$

素因数の和:263742

約数の個数: 20

約数和(自身を含む): 49053780

約数和(自身を除く): 27955460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263729, 527458, 1054916, 1318645, 2109832, 2637290, 4219664, 5274580, 10549160, 21098320]

約数ペア:

[(1, 21098320), (2, 10549160), (4, 5274580), (5, 4219664), (8, 2637290), (10, 2109832), (16, 1318645), (20, 1054916), (40, 527458), (80, 263729)]