664443

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{631}}^1$

素因数の和:656

約数の個数: 20

約数和(自身を含む): 1070608

約数和(自身を除く): 406165

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 631, 1053, 1893, 5679, 8203, 17037, 24609, 51111, 73827, 221481, 664443]

約数ペア:

[(1, 664443), (3, 221481), (9, 73827), (13, 51111), (27, 24609), (39, 17037), (81, 8203), (117, 5679), (351, 1893), (631, 1053)]