20640821

素因数分解:

${\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{317}}^1$

素因数の和:508

約数の個数: 16

約数和(自身を含む): 22896000

約数和(自身を除く): 2255179

約数列:

[1, 19, 23, 149, 317, 437, 2831, 3427, 6023, 7291, 47233, 65113, 138529, 897427, 1086359, 20640821]

約数ペア:

[(1, 20640821), (19, 1086359), (23, 897427), (149, 138529), (317, 65113), (437, 47233), (2831, 7291), (3427, 6023)]