20865519

素因数分解:

$3^4\times {\mathrm{313}}^1\times {\mathrm{823}}^1$

素因数の和:1148

約数の個数: 20

約数和(自身を含む): 31307056

約数和(自身を除く): 10441537

約数列:

[1, 3, 9, 27, 81, 313, 823, 939, 2469, 2817, 7407, 8451, 22221, 25353, 66663, 257599, 772797, 2318391, 6955173, 20865519]

約数ペア:

[(1, 20865519), (3, 6955173), (9, 2318391), (27, 772797), (81, 257599), (313, 66663), (823, 25353), (939, 22221), (2469, 8451), (2817, 7407)]