20212820

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21503}}^1$

素因数の和:21559

約数の個数: 24

約数和(自身を含む): 43352064

約数和(自身を除く): 23139244

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21503, 43006, 86012, 107515, 215030, 430060, 1010641, 2021282, 4042564, 5053205, 10106410, 20212820]

約数ペア:

[(1, 20212820), (2, 10106410), (4, 5053205), (5, 4042564), (10, 2021282), (20, 1010641), (47, 430060), (94, 215030), (188, 107515), (235, 86012), (470, 43006), (940, 21503)]