19857620

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9109}}^1$

素因数の和:9227

約数の個数: 24

約数和(自身を含む): 42088200

約数和(自身を除く): 22230580

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9109, 18218, 36436, 45545, 91090, 182180, 992881, 1985762, 3971524, 4964405, 9928810, 19857620]

約数ペア:

[(1, 19857620), (2, 9928810), (4, 4964405), (5, 3971524), (10, 1985762), (20, 992881), (109, 182180), (218, 91090), (436, 45545), (545, 36436), (1090, 18218), (2180, 9109)]