20393009

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7229}}^1$

素因数の和:7280

約数の個数: 16

約数和(自身を含む): 25912320

約数和(自身を除く): 5519311

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 7229, 50603, 93977, 224099, 657839, 1568693, 2913287, 20393009]

約数ペア:

[(1, 20393009), (7, 2913287), (13, 1568693), (31, 657839), (91, 224099), (217, 93977), (403, 50603), (2821, 7229)]