19995778

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{8999}}^1$

素因数の和:9113

約数の個数: 16

約数和(自身を含む): 33048000

約数和(自身を除く): 13052222

約数列:

[1, 2, 11, 22, 101, 202, 1111, 2222, 8999, 17998, 98989, 197978, 908899, 1817798, 9997889, 19995778]

約数ペア:

[(1, 19995778), (2, 9997889), (11, 1817798), (22, 908899), (101, 197978), (202, 98989), (1111, 17998), (2222, 8999)]