123222020

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{61001}}^1$

素因数の和:61111

約数の個数: 24

約数和(自身を含む): 261332568

約数和(自身を除く): 138110548

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 61001, 122002, 244004, 305005, 610010, 1220020, 6161101, 12322202, 24644404, 30805505, 61611010, 123222020]

約数ペア:

[(1, 123222020), (2, 61611010), (4, 30805505), (5, 24644404), (10, 12322202), (20, 6161101), (101, 1220020), (202, 610010), (404, 305005), (505, 244004), (1010, 122002), (2020, 61001)]