19900321

素因数分解:

$7^2\times {\mathrm{103}}^1\times {\mathrm{3943}}^1$

素因数の和:4060

約数の個数: 12

約数和(自身を含む): 23380032

約数和(自身を除く): 3479711

約数列:

[1, 7, 49, 103, 721, 3943, 5047, 27601, 193207, 406129, 2842903, 19900321]

約数ペア:

[(1, 19900321), (7, 2842903), (49, 406129), (103, 193207), (721, 27601), (3943, 5047)]