20001278

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{21143}}^1$

素因数の和:21199

約数の個数: 16

約数和(自身を含む): 33492096

約数和(自身を除く): 13490818

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 21143, 42286, 232573, 465146, 909149, 1818298, 10000639, 20001278]

約数ペア:

[(1, 20001278), (2, 10000639), (11, 1818298), (22, 909149), (43, 465146), (86, 232573), (473, 42286), (946, 21143)]