17998940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{20929}}^1$

素因数の和:20981

約数の個数: 24

約数和(自身を含む): 38678640

約数和(自身を除く): 20679700

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 20929, 41858, 83716, 104645, 209290, 418580, 899947, 1799894, 3599788, 4499735, 8999470, 17998940]

約数ペア:

[(1, 17998940), (2, 8999470), (4, 4499735), (5, 3599788), (10, 1799894), (20, 899947), (43, 418580), (86, 209290), (172, 104645), (215, 83716), (430, 41858), (860, 20929)]