20178790

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19979}}^1$

素因数の和:20087

約数の個数: 16

約数和(自身を含む): 36683280

約数和(自身を除く): 16504490

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 19979, 39958, 99895, 199790, 2017879, 4035758, 10089395, 20178790]

約数ペア:

[(1, 20178790), (2, 10089395), (5, 4035758), (10, 2017879), (101, 199790), (202, 99895), (505, 39958), (1010, 19979)]