20399128

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{227}}^1\times {\mathrm{239}}^1$

素因数の和:519

約数の個数: 32

約数和(自身を含む): 39398400

約数和(自身を除く): 18999272

約数列:

[1, 2, 4, 8, 47, 94, 188, 227, 239, 376, 454, 478, 908, 956, 1816, 1912, 10669, 11233, 21338, 22466, 42676, 44932, 54253, 85352, 89864, 108506, 217012, 434024, 2549891, 5099782, 10199564, 20399128]

約数ペア:

[(1, 20399128), (2, 10199564), (4, 5099782), (8, 2549891), (47, 434024), (94, 217012), (188, 108506), (227, 89864), (239, 85352), (376, 54253), (454, 44932), (478, 42676), (908, 22466), (956, 21338), (1816, 11233), (1912, 10669)]