278559

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:212

約数の個数: 20

約数和(自身を含む): 440440

約数和(自身を除く): 161881

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 181, 513, 543, 1539, 1629, 3439, 4887, 10317, 14661, 30951, 92853, 278559]

約数ペア:

[(1, 278559), (3, 92853), (9, 30951), (19, 14661), (27, 10317), (57, 4887), (81, 3439), (171, 1629), (181, 1539), (513, 543)]