20400723

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4099}}^1$

素因数の和:4191

約数の個数: 24

約数和(自身を含む): 34112000

約数和(自身を除く): 13711277

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4099, 4977, 12297, 28693, 36891, 86079, 258237, 323821, 971463, 2266747, 2914389, 6800241, 20400723]

約数ペア:

[(1, 20400723), (3, 6800241), (7, 2914389), (9, 2266747), (21, 971463), (63, 323821), (79, 258237), (237, 86079), (553, 36891), (711, 28693), (1659, 12297), (4099, 4977)]