21393128

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{233}}^1\times {\mathrm{499}}^1$

素因数の和:761

約数の個数: 32

約数和(自身を含む): 42120000

約数和(自身を除く): 20726872

約数列:

[1, 2, 4, 8, 23, 46, 92, 184, 233, 466, 499, 932, 998, 1864, 1996, 3992, 5359, 10718, 11477, 21436, 22954, 42872, 45908, 91816, 116267, 232534, 465068, 930136, 2674141, 5348282, 10696564, 21393128]

約数ペア:

[(1, 21393128), (2, 10696564), (4, 5348282), (8, 2674141), (23, 930136), (46, 465068), (92, 232534), (184, 116267), (233, 91816), (466, 45908), (499, 42872), (932, 22954), (998, 21436), (1864, 11477), (1996, 10718), (3992, 5359)]