2171781

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:245

約数の個数: 24

約数和(自身を含む): 3327480

約数和(自身を除く): 1155699

約数列:

[1, 3, 9, 29, 53, 87, 157, 159, 261, 471, 477, 1413, 1537, 4553, 4611, 8321, 13659, 13833, 24963, 40977, 74889, 241309, 723927, 2171781]

約数ペア:

[(1, 2171781), (3, 723927), (9, 241309), (29, 74889), (53, 40977), (87, 24963), (157, 13833), (159, 13659), (261, 8321), (471, 4611), (477, 4553), (1413, 1537)]