20820620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25391}}^1$

素因数の和:25441

約数の個数: 24

約数和(自身を含む): 44791488

約数和(自身を除く): 23970868

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25391, 50782, 101564, 126955, 253910, 507820, 1041031, 2082062, 4164124, 5205155, 10410310, 20820620]

約数ペア:

[(1, 20820620), (2, 10410310), (4, 5205155), (5, 4164124), (10, 2082062), (20, 1041031), (41, 507820), (82, 253910), (164, 126955), (205, 101564), (410, 50782), (820, 25391)]