21375730

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{49711}}^1$

素因数の和:49761

約数の個数: 16

約数和(自身を含む): 39371904

約数和(自身を除く): 17996174

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 49711, 99422, 248555, 497110, 2137573, 4275146, 10687865, 21375730]

約数ペア:

[(1, 21375730), (2, 10687865), (5, 4275146), (10, 2137573), (43, 497110), (86, 248555), (215, 99422), (430, 49711)]