20591417

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:210

約数の個数: 36

約数和(自身を含む): 27655488

約数和(自身を除く): 7064071

約数列:

[1, 7, 11, 23, 49, 77, 121, 151, 161, 253, 539, 847, 1057, 1127, 1661, 1771, 2783, 3473, 5929, 7399, 11627, 12397, 18271, 19481, 24311, 38203, 81389, 127897, 136367, 170177, 267421, 420233, 895279, 1871947, 2941631, 20591417]

約数ペア:

[(1, 20591417), (7, 2941631), (11, 1871947), (23, 895279), (49, 420233), (77, 267421), (121, 170177), (151, 136367), (161, 127897), (253, 81389), (539, 38203), (847, 24311), (1057, 19481), (1127, 18271), (1661, 12397), (1771, 11627), (2783, 7399), (3473, 5929)]