21028635

素因数分解:

$3^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1663}}^1$

素因数の和:1955

約数の個数: 24

約数和(自身を含む): 36601344

約数和(自身を除く): 15572709

約数列:

[1, 3, 5, 9, 15, 45, 281, 843, 1405, 1663, 2529, 4215, 4989, 8315, 12645, 14967, 24945, 74835, 467303, 1401909, 2336515, 4205727, 7009545, 21028635]

約数ペア:

[(1, 21028635), (3, 7009545), (5, 4205727), (9, 2336515), (15, 1401909), (45, 467303), (281, 74835), (843, 24945), (1405, 14967), (1663, 12645), (2529, 8315), (4215, 4989)]