821121

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:712

約数の個数: 16

約数和(自身を含む): 1273728

約数和(自身を除く): 452607

約数列:

[1, 3, 7, 21, 61, 183, 427, 641, 1281, 1923, 4487, 13461, 39101, 117303, 273707, 821121]

約数ペア:

[(1, 821121), (3, 273707), (7, 117303), (21, 39101), (61, 13461), (183, 4487), (427, 1923), (641, 1281)]