20577820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2087}}^1$

素因数の和:2142

約数の個数: 48

約数和(自身を含む): 47355840

約数和(自身を除く): 26778020

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 2087, 2465, 4174, 4930, 8348, 9860, 10435, 20870, 35479, 41740, 60523, 70958, 121046, 141916, 177395, 242092, 302615, 354790, 605230, 709580, 1028891, 1210460, 2057782, 4115564, 5144455, 10288910, 20577820]

約数ペア:

[(1, 20577820), (2, 10288910), (4, 5144455), (5, 4115564), (10, 2057782), (17, 1210460), (20, 1028891), (29, 709580), (34, 605230), (58, 354790), (68, 302615), (85, 242092), (116, 177395), (145, 141916), (170, 121046), (290, 70958), (340, 60523), (493, 41740), (580, 35479), (986, 20870), (1972, 10435), (2087, 9860), (2465, 8348), (4174, 4930)]