20757020

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2039}}^1$

素因数の和:2557

約数の個数: 24

約数和(自身を含む): 43696800

約数和(自身を除く): 22939780

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2039, 2545, 4078, 5090, 8156, 10180, 10195, 20390, 40780, 1037851, 2075702, 4151404, 5189255, 10378510, 20757020]

約数ペア:

[(1, 20757020), (2, 10378510), (4, 5189255), (5, 4151404), (10, 2075702), (20, 1037851), (509, 40780), (1018, 20390), (2036, 10195), (2039, 10180), (2545, 8156), (4078, 5090)]