21891290

素因数分解:

$2^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{7039}}^1$

素因数の和:7357

約数の個数: 16

約数和(自身を含む): 39536640

約数和(自身を除く): 17645350

約数列:

[1, 2, 5, 10, 311, 622, 1555, 3110, 7039, 14078, 35195, 70390, 2189129, 4378258, 10945645, 21891290]

約数ペア:

[(1, 21891290), (2, 10945645), (5, 4378258), (10, 2189129), (311, 70390), (622, 35195), (1555, 14078), (3110, 7039)]