21200390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{111581}}^1$

素因数の和:111607

約数の個数: 16

約数和(自身を含む): 40169520

約数和(自身を除く): 18969130

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 111581, 223162, 557905, 1115810, 2120039, 4240078, 10600195, 21200390]

約数ペア:

[(1, 21200390), (2, 10600195), (5, 4240078), (10, 2120039), (19, 1115810), (38, 557905), (95, 223162), (190, 111581)]