639331

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1$

素因数の和:79

約数の個数: 24

約数和(自身を含む): 877824

約数和(自身を除く): 238493

約数列:

[1, 7, 11, 19, 23, 77, 133, 161, 209, 253, 361, 437, 1463, 1771, 2527, 3059, 3971, 4807, 8303, 27797, 33649, 58121, 91333, 639331]

約数ペア:

[(1, 639331), (7, 91333), (11, 58121), (19, 33649), (23, 27797), (77, 8303), (133, 4807), (161, 3971), (209, 3059), (253, 2527), (361, 1771), (437, 1463)]