21158215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{1997}}^1$

素因数の和:2178

約数の個数: 16

約数和(自身を含む): 27524448

約数和(自身を除く): 6366233

約数列:

[1, 5, 13, 65, 163, 815, 1997, 2119, 9985, 10595, 25961, 129805, 325511, 1627555, 4231643, 21158215]

約数ペア:

[(1, 21158215), (5, 4231643), (13, 1627555), (65, 325511), (163, 129805), (815, 25961), (1997, 10595), (2119, 9985)]