20321399

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{2531}}^1$

素因数の和:2606

約数の個数: 16

約数和(自身を含む): 24631296

約数和(自身を除く): 4309897

約数列:

[1, 7, 31, 37, 217, 259, 1147, 2531, 8029, 17717, 78461, 93647, 549227, 655529, 2903057, 20321399]

約数ペア:

[(1, 20321399), (7, 2903057), (31, 655529), (37, 549227), (217, 93647), (259, 78461), (1147, 17717), (2531, 8029)]