20387521

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{1777}}^1$

素因数の和:1944

約数の個数: 16

約数和(自身を含む): 25603200

約数和(自身を除く): 5215679

約数列:

[1, 7, 11, 77, 149, 1043, 1639, 1777, 11473, 12439, 19547, 136829, 264773, 1853411, 2912503, 20387521]

約数ペア:

[(1, 20387521), (7, 2912503), (11, 1853411), (77, 264773), (149, 136829), (1043, 19547), (1639, 12439), (1777, 11473)]