20806387

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{2143}}^1$

素因数の和:2242

約数の個数: 16

約数和(自身を含む): 25384960

約数和(自身を除く): 4578573

約数列:

[1, 7, 19, 73, 133, 511, 1387, 2143, 9709, 15001, 40717, 156439, 285019, 1095073, 2972341, 20806387]

約数ペア:

[(1, 20806387), (7, 2972341), (19, 1095073), (73, 285019), (133, 156439), (511, 40717), (1387, 15001), (2143, 9709)]