20911377

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{521}}^1\times {\mathrm{787}}^1$

素因数の和:1328

約数の個数: 16

約数和(自身を含む): 29616192

約数和(自身を除く): 8704815

約数列:

[1, 3, 17, 51, 521, 787, 1563, 2361, 8857, 13379, 26571, 40137, 410027, 1230081, 6970459, 20911377]

約数ペア:

[(1, 20911377), (3, 6970459), (17, 1230081), (51, 410027), (521, 40137), (787, 26571), (1563, 13379), (2361, 8857)]