816654321

素因数分解:

$3^2\times 7^1\times {\mathrm{223}}^1\times {\mathrm{58129}}^1$

素因数の和:58365

約数の個数: 24

約数和(自身を含む): 1354196480

約数和(自身を除く): 537542159

約数列:

[1, 3, 7, 9, 21, 63, 223, 669, 1561, 2007, 4683, 14049, 58129, 174387, 406903, 523161, 1220709, 3662127, 12962767, 38888301, 90739369, 116664903, 272218107, 816654321]

約数ペア:

[(1, 816654321), (3, 272218107), (7, 116664903), (9, 90739369), (21, 38888301), (63, 12962767), (223, 3662127), (669, 1220709), (1561, 523161), (2007, 406903), (4683, 174387), (14049, 58129)]