21353620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26041}}^1$

素因数の和:26091

約数の個数: 24

約数和(自身を含む): 45938088

約数和(自身を除く): 24584468

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26041, 52082, 104164, 130205, 260410, 520820, 1067681, 2135362, 4270724, 5338405, 10676810, 21353620]

約数ペア:

[(1, 21353620), (2, 10676810), (4, 5338405), (5, 4270724), (10, 2135362), (20, 1067681), (41, 520820), (82, 260410), (164, 130205), (205, 104164), (410, 52082), (820, 26041)]