21001659

素因数分解:

$3^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{3559}}^1$

素因数の和:3850

約数の個数: 16

約数和(自身を含む): 32125440

約数和(自身を除く): 11123781

約数列:

[1, 3, 7, 21, 281, 843, 1967, 3559, 5901, 10677, 24913, 74739, 1000079, 3000237, 7000553, 21001659]

約数ペア:

[(1, 21001659), (3, 7000553), (7, 3000237), (21, 1000079), (281, 74739), (843, 24913), (1967, 10677), (3559, 5901)]