668331

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{223}}^1$

素因数の和:272

約数の個数: 20

約数和(自身を含む): 1029952

約数和(自身を除く): 361621

約数列:

[1, 3, 9, 27, 37, 81, 111, 223, 333, 669, 999, 2007, 2997, 6021, 8251, 18063, 24753, 74259, 222777, 668331]

約数ペア:

[(1, 668331), (3, 222777), (9, 74259), (27, 24753), (37, 18063), (81, 8251), (111, 6021), (223, 2997), (333, 2007), (669, 999)]