20518808

素因数分解:

$2^3\times {\mathrm{509}}^1\times {\mathrm{5039}}^1$

素因数の和:5554

約数の個数: 16

約数和(自身を含む): 38556000

約数和(自身を除く): 18037192

約数列:

[1, 2, 4, 8, 509, 1018, 2036, 4072, 5039, 10078, 20156, 40312, 2564851, 5129702, 10259404, 20518808]

約数ペア:

[(1, 20518808), (2, 10259404), (4, 5129702), (8, 2564851), (509, 40312), (1018, 20156), (2036, 10078), (4072, 5039)]