20990192

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30509}}^1$

素因数の和:30560

約数の個数: 20

約数和(自身を含む): 41615640

約数和(自身を除く): 20625448

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30509, 61018, 122036, 244072, 488144, 1311887, 2623774, 5247548, 10495096, 20990192]

約数ペア:

[(1, 20990192), (2, 10495096), (4, 5247548), (8, 2623774), (16, 1311887), (43, 488144), (86, 244072), (172, 122036), (344, 61018), (688, 30509)]