198220180

素因数分解:

$2^2\times 5^1\times {\mathrm{9911009}}^1$

素因数の和:9911018

約数の個数: 12

約数和(自身を含む): 416262420

約数和(自身を除く): 218042240

約数列:

[1, 2, 4, 5, 10, 20, 9911009, 19822018, 39644036, 49555045, 99110090, 198220180]

約数ペア:

[(1, 198220180), (2, 99110090), (4, 49555045), (5, 39644036), (10, 19822018), (20, 9911009)]