20645320

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5011}}^1$

素因数の和:5125

約数の個数: 32

約数和(自身を含む): 46912320

約数和(自身を除く): 26267000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5011, 10022, 20044, 25055, 40088, 50110, 100220, 200440, 516133, 1032266, 2064532, 2580665, 4129064, 5161330, 10322660, 20645320]

約数ペア:

[(1, 20645320), (2, 10322660), (4, 5161330), (5, 4129064), (8, 2580665), (10, 2064532), (20, 1032266), (40, 516133), (103, 200440), (206, 100220), (412, 50110), (515, 40088), (824, 25055), (1030, 20044), (2060, 10022), (4120, 5011)]