21493031

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{239}}^1\times {\mathrm{443}}^1$

素因数の和:718

約数の個数: 16

約数和(自身を含む): 25574400

約数和(自身を除く): 4081369

約数列:

[1, 7, 29, 203, 239, 443, 1673, 3101, 6931, 12847, 48517, 89929, 105877, 741139, 3070433, 21493031]

約数ペア:

[(1, 21493031), (7, 3070433), (29, 741139), (203, 105877), (239, 89929), (443, 48517), (1673, 12847), (3101, 6931)]