21157390

素因数分解:

$2^1\times 5^1\times {\mathrm{241}}^1\times {\mathrm{8779}}^1$

素因数の和:9027

約数の個数: 16

約数和(自身を含む): 38245680

約数和(自身を除く): 17088290

約数列:

[1, 2, 5, 10, 241, 482, 1205, 2410, 8779, 17558, 43895, 87790, 2115739, 4231478, 10578695, 21157390]

約数ペア:

[(1, 21157390), (2, 10578695), (5, 4231478), (10, 2115739), (241, 87790), (482, 43895), (1205, 17558), (2410, 8779)]