21000399428

素因数分解:

$2^2\times {\mathrm{47779}}^1\times {\mathrm{109883}}^1$

素因数の和:157666

約数の個数: 12

約数和(自身を含む): 36751802640

約数和(自身を除く): 15751403212

約数列:

[1, 2, 4, 47779, 95558, 109883, 191116, 219766, 439532, 5250099857, 10500199714, 21000399428]

約数ペア:

[(1, 21000399428), (2, 10500199714), (4, 5250099857), (47779, 439532), (95558, 219766), (109883, 191116)]