20806045

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{991}}^1$

素因数の和:1045

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 9192035

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 991, 1105, 1235, 1615, 4199, 4955, 12883, 16847, 18829, 20995, 64415, 84235, 94145, 219011, 244777, 320093, 1095055, 1223885, 1600465, 4161209, 20806045]

約数ペア:

[(1, 20806045), (5, 4161209), (13, 1600465), (17, 1223885), (19, 1095055), (65, 320093), (85, 244777), (95, 219011), (221, 94145), (247, 84235), (323, 64415), (991, 20995), (1105, 18829), (1235, 16847), (1615, 12883), (4199, 4955)]