20918331

素因数分解:

$3^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{467}}^1$

素因数の和:565

約数の個数: 40

約数和(自身を含む): 36241920

約数和(自身を除く): 15323589

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 189, 237, 467, 553, 567, 711, 1401, 1659, 2133, 3269, 4203, 4977, 6399, 9807, 12609, 14931, 29421, 36893, 37827, 44793, 88263, 110679, 258251, 264789, 332037, 774753, 996111, 2324259, 2988333, 6972777, 20918331]

約数ペア:

[(1, 20918331), (3, 6972777), (7, 2988333), (9, 2324259), (21, 996111), (27, 774753), (63, 332037), (79, 264789), (81, 258251), (189, 110679), (237, 88263), (467, 44793), (553, 37827), (567, 36893), (711, 29421), (1401, 14931), (1659, 12609), (2133, 9807), (3269, 6399), (4203, 4977)]