21521065

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{5387}}^1$

素因数の和:5456

約数の個数: 16

約数和(自身を含む): 27931392

約数和(自身を除く): 6410327

約数列:

[1, 5, 17, 47, 85, 235, 799, 3995, 5387, 26935, 91579, 253189, 457895, 1265945, 4304213, 21521065]

約数ペア:

[(1, 21521065), (5, 4304213), (17, 1265945), (47, 457895), (85, 253189), (235, 91579), (799, 26935), (3995, 5387)]