20816020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{54779}}^1$

素因数の和:54807

約数の個数: 24

約数和(自身を含む): 46015200

約数和(自身を除く): 25199180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 54779, 109558, 219116, 273895, 547790, 1040801, 1095580, 2081602, 4163204, 5204005, 10408010, 20816020]

約数ペア:

[(1, 20816020), (2, 10408010), (4, 5204005), (5, 4163204), (10, 2081602), (19, 1095580), (20, 1040801), (38, 547790), (76, 273895), (95, 219116), (190, 109558), (380, 54779)]