21965260

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25541}}^1$

素因数の和:25593

約数の個数: 24

約数和(自身を含む): 47201616

約数和(自身を除く): 25236356

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25541, 51082, 102164, 127705, 255410, 510820, 1098263, 2196526, 4393052, 5491315, 10982630, 21965260]

約数ペア:

[(1, 21965260), (2, 10982630), (4, 5491315), (5, 4393052), (10, 2196526), (20, 1098263), (43, 510820), (86, 255410), (172, 127705), (215, 102164), (430, 51082), (860, 25541)]