20755780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9521}}^1$

素因数の和:9639

約数の個数: 24

約数和(自身を含む): 43991640

約数和(自身を除く): 23235860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9521, 19042, 38084, 47605, 95210, 190420, 1037789, 2075578, 4151156, 5188945, 10377890, 20755780]

約数ペア:

[(1, 20755780), (2, 10377890), (4, 5188945), (5, 4151156), (10, 2075578), (20, 1037789), (109, 190420), (218, 95210), (436, 47605), (545, 38084), (1090, 19042), (2180, 9521)]