81287716

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{2399}}^1$

素因数の和:2643

約数の個数: 24

約数和(自身を含む): 146361600

約数和(自身を除く): 65073884

約数列:

[1, 2, 4, 43, 86, 172, 197, 394, 788, 2399, 4798, 8471, 9596, 16942, 33884, 103157, 206314, 412628, 472603, 945206, 1890412, 20321929, 40643858, 81287716]

約数ペア:

[(1, 81287716), (2, 40643858), (4, 20321929), (43, 1890412), (86, 945206), (172, 472603), (197, 412628), (394, 206314), (788, 103157), (2399, 33884), (4798, 16942), (8471, 9596)]