642807

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:211

約数の個数: 24

約数和(自身を含む): 1043328

約数和(自身を除く): 400521

約数列:

[1, 3, 9, 11, 33, 43, 99, 129, 151, 387, 453, 473, 1359, 1419, 1661, 4257, 4983, 6493, 14949, 19479, 58437, 71423, 214269, 642807]

約数ペア:

[(1, 642807), (3, 214269), (9, 71423), (11, 58437), (33, 19479), (43, 14949), (99, 6493), (129, 4983), (151, 4257), (387, 1661), (453, 1419), (473, 1359)]