20658235

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3571}}^1$

素因数の和:3678

約数の個数: 16

約数和(自身を含む): 27004320

約数和(自身を除く): 6346085

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3571, 5785, 17855, 46423, 232115, 317819, 1589095, 4131647, 20658235]

約数ペア:

[(1, 20658235), (5, 4131647), (13, 1589095), (65, 317819), (89, 232115), (445, 46423), (1157, 17855), (3571, 5785)]