21655640

素因数分解:

$2^3\times 5^1\times {\mathrm{541391}}^1$

素因数の和:541402

約数の個数: 16

約数和(自身を含む): 48725280

約数和(自身を除く): 27069640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541391, 1082782, 2165564, 2706955, 4331128, 5413910, 10827820, 21655640]

約数ペア:

[(1, 21655640), (2, 10827820), (4, 5413910), (5, 4331128), (8, 2706955), (10, 2165564), (20, 1082782), (40, 541391)]