21234260

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24691}}^1$

素因数の和:24743

約数の個数: 24

約数和(自身を含む): 45630816

約数和(自身を除く): 24396556

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24691, 49382, 98764, 123455, 246910, 493820, 1061713, 2123426, 4246852, 5308565, 10617130, 21234260]

約数ペア:

[(1, 21234260), (2, 10617130), (4, 5308565), (5, 4246852), (10, 2123426), (20, 1061713), (43, 493820), (86, 246910), (172, 123455), (215, 98764), (430, 49382), (860, 24691)]