21754660

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2137}}^1$

素因数の和:2655

約数の個数: 24

約数和(自身を含む): 45795960

約数和(自身を除く): 24041300

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2137, 2545, 4274, 5090, 8548, 10180, 10685, 21370, 42740, 1087733, 2175466, 4350932, 5438665, 10877330, 21754660]

約数ペア:

[(1, 21754660), (2, 10877330), (4, 5438665), (5, 4350932), (10, 2175466), (20, 1087733), (509, 42740), (1018, 21370), (2036, 10685), (2137, 10180), (2545, 8548), (4274, 5090)]