20181889

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{977}}^1$

素因数の和:1224

約数の個数: 16

約数和(自身を含む): 24974208

約数和(自身を除く): 4792319

約数列:

[1, 7, 13, 91, 227, 977, 1589, 2951, 6839, 12701, 20657, 88907, 221779, 1552453, 2883127, 20181889]

約数ペア:

[(1, 20181889), (7, 2883127), (13, 1552453), (91, 221779), (227, 88907), (977, 20657), (1589, 12701), (2951, 6839)]