20620985

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2819}}^1$

素因数の和:2861

約数の個数: 32

約数和(自身を含む): 32486400

約数和(自身を除く): 11865415

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 209, 385, 665, 1045, 1463, 2819, 7315, 14095, 19733, 31009, 53561, 98665, 155045, 217063, 267805, 374927, 589171, 1085315, 1874635, 2945855, 4124197, 20620985]

約数ペア:

[(1, 20620985), (5, 4124197), (7, 2945855), (11, 1874635), (19, 1085315), (35, 589171), (55, 374927), (77, 267805), (95, 217063), (133, 155045), (209, 98665), (385, 53561), (665, 31009), (1045, 19733), (1463, 14095), (2819, 7315)]