21389517

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{191}}^1\times {\mathrm{541}}^1$

素因数の和:761

約数の個数: 24

約数和(自身を含む): 32467968

約数和(自身を除く): 11078451

約数列:

[1, 3, 9, 23, 69, 191, 207, 541, 573, 1623, 1719, 4393, 4869, 12443, 13179, 37329, 39537, 103331, 111987, 309993, 929979, 2376613, 7129839, 21389517]

約数ペア:

[(1, 21389517), (3, 7129839), (9, 2376613), (23, 929979), (69, 309993), (191, 111987), (207, 103331), (541, 39537), (573, 37329), (1623, 13179), (1719, 12443), (4393, 4869)]