20907207

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:420

約数の個数: 32

約数和(自身を含む): 32693760

約数和(自身を除く): 11786553

約数列:

[1, 3, 9, 23, 27, 69, 131, 207, 257, 393, 621, 771, 1179, 2313, 3013, 3537, 5911, 6939, 9039, 17733, 27117, 33667, 53199, 81351, 101001, 159597, 303003, 774341, 909009, 2323023, 6969069, 20907207]

約数ペア:

[(1, 20907207), (3, 6969069), (9, 2323023), (23, 909009), (27, 774341), (69, 303003), (131, 159597), (207, 101001), (257, 81351), (393, 53199), (621, 33667), (771, 27117), (1179, 17733), (2313, 9039), (3013, 6939), (3537, 5911)]