21091760

素因数分解:

$2^4\times 5^1\times {\mathrm{263647}}^1$

素因数の和:263660

約数の個数: 20

約数和(自身を含む): 49038528

約数和(自身を除く): 27946768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263647, 527294, 1054588, 1318235, 2109176, 2636470, 4218352, 5272940, 10545880, 21091760]

約数ペア:

[(1, 21091760), (2, 10545880), (4, 5272940), (5, 4218352), (8, 2636470), (10, 2109176), (16, 1318235), (20, 1054588), (40, 527294), (80, 263647)]