20578940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23929}}^1$

素因数の和:23981

約数の個数: 24

約数和(自身を含む): 44222640

約数和(自身を除く): 23643700

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23929, 47858, 95716, 119645, 239290, 478580, 1028947, 2057894, 4115788, 5144735, 10289470, 20578940]

約数ペア:

[(1, 20578940), (2, 10289470), (4, 5144735), (5, 4115788), (10, 2057894), (20, 1028947), (43, 478580), (86, 239290), (172, 119645), (215, 95716), (430, 47858), (860, 23929)]