21670216

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{51109}}^1$

素因数の和:51168

約数の個数: 16

約数和(自身を含む): 41399100

約数和(自身を除く): 19728884

約数列:

[1, 2, 4, 8, 53, 106, 212, 424, 51109, 102218, 204436, 408872, 2708777, 5417554, 10835108, 21670216]

約数ペア:

[(1, 21670216), (2, 10835108), (4, 5417554), (8, 2708777), (53, 408872), (106, 204436), (212, 102218), (424, 51109)]