20468020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{229}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 44629200

約数和(自身を除く): 24161180

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 109, 164, 205, 218, 229, 410, 436, 458, 545, 820, 916, 1090, 1145, 2180, 2290, 4469, 4580, 8938, 9389, 17876, 18778, 22345, 24961, 37556, 44690, 46945, 49922, 89380, 93890, 99844, 124805, 187780, 249610, 499220, 1023401, 2046802, 4093604, 5117005, 10234010, 20468020]

約数ペア:

[(1, 20468020), (2, 10234010), (4, 5117005), (5, 4093604), (10, 2046802), (20, 1023401), (41, 499220), (82, 249610), (109, 187780), (164, 124805), (205, 99844), (218, 93890), (229, 89380), (410, 49922), (436, 46945), (458, 44690), (545, 37556), (820, 24961), (916, 22345), (1090, 18778), (1145, 17876), (2180, 9389), (2290, 8938), (4469, 4580)]