640281

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1$

素因数の和:308

約数の個数: 16

約数和(自身を含む): 921600

約数和(自身を除く): 281319

約数列:

[1, 3, 19, 47, 57, 141, 239, 717, 893, 2679, 4541, 11233, 13623, 33699, 213427, 640281]

約数ペア:

[(1, 640281), (3, 213427), (19, 33699), (47, 13623), (57, 11233), (141, 4541), (239, 2679), (717, 893)]